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Finding the Fourth Proportional to 21,371,909,525.55, 29,859,520,383.45 and 21,371,909,525.55

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Solution

The fourth proportional to 21,371,909,525.55, 29,859,520,383.45 and 21,371,909,525.55 is: 29,859,520,383.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,371,909,525.55 : 29,859,520,383.45 = 21,371,909,525.55 : x
  2. Step 2: Convert to fraction form
    21,371,909,525.55/29,859,520,383.45 = 21,371,909,525.55/x
  3. Step 3: Cross multiply
    21,371,909,525.55x = 29,859,520,383.45 × 21,371,909,525.55
  4. Step 4: Simplify right side
    21,371,909,525.55x = 638,154,968,111,409,397,760
  5. Step 5: Solve for x
    x = 638,154,968,111,409,397,760/21,371,909,525.55
  6. Step 6: Final answer
    x = 29,859,520,383.45

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.