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Finding the Fourth Proportional to 21,160,116.90, 29,691,348.30 and 21,160,116.90

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Solution

The fourth proportional to 21,160,116.90, 29,691,348.30 and 21,160,116.90 is: 29,691,348.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,160,116.90 : 29,691,348.30 = 21,160,116.90 : x
  2. Step 2: Convert to fraction form
    21,160,116.90/29,691,348.30 = 21,160,116.90/x
  3. Step 3: Cross multiply
    21,160,116.90x = 29,691,348.30 × 21,160,116.90
  4. Step 4: Simplify right side
    21,160,116.90x = 628,272,400,946,616.25
  5. Step 5: Solve for x
    x = 628,272,400,946,616.25/21,160,116.90
  6. Step 6: Final answer
    x = 29,691,348.30

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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.