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Finding the Fourth Proportional to 30,128,021.80, 45,192,032.70 and 30,128,021.80

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Solution

The fourth proportional to 30,128,021.80, 45,192,032.70 and 30,128,021.80 is: 45,192,032.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,128,021.80 : 45,192,032.70 = 30,128,021.80 : x
  2. Step 2: Convert to fraction form
    30,128,021.80/45,192,032.70 = 30,128,021.80/x
  3. Step 3: Cross multiply
    30,128,021.80x = 45,192,032.70 × 30,128,021.80
  4. Step 4: Simplify right side
    30,128,021.80x = 1,361,546,546,371,913
  5. Step 5: Solve for x
    x = 1,361,546,546,371,913/30,128,021.80
  6. Step 6: Final answer
    x = 45,192,032.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.