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Finding the Fourth Proportional to 98,286,791.72, 135,684,877.02 and 61,129,049.72

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Solution

The fourth proportional to 98,286,791.72, 135,684,877.02 and 61,129,049.72 is: 84,388,628.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,286,791.72 : 135,684,877.02 = 61,129,049.72 : x
  2. Step 2: Convert to fraction form
    98,286,791.72/135,684,877.02 = 61,129,049.72/x
  3. Step 3: Cross multiply
    98,286,791.72x = 135,684,877.02 × 61,129,049.72
  4. Step 4: Simplify right side
    98,286,791.72x = 8,294,287,593,607,666
  5. Step 5: Solve for x
    x = 8,294,287,593,607,666/98,286,791.72
  6. Step 6: Final answer
    x = 84,388,628.91

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.