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Finding the Fourth Proportional to 61,969,531.80, 92,957,796.90 and 18,840,142.20

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Solution

The fourth proportional to 61,969,531.80, 92,957,796.90 and 18,840,142.20 is: 28,261,277.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,969,531.80 : 92,957,796.90 = 18,840,142.20 : x
  2. Step 2: Convert to fraction form
    61,969,531.80/92,957,796.90 = 18,840,142.20/x
  3. Step 3: Cross multiply
    61,969,531.80x = 92,957,796.90 × 18,840,142.20
  4. Step 4: Simplify right side
    61,969,531.80x = 1,751,338,112,194,719.25
  5. Step 5: Solve for x
    x = 1,751,338,112,194,719.25/61,969,531.80
  6. Step 6: Final answer
    x = 28,261,277.14

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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.