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Finding the Fourth Proportional to 261,999,426.62, 392,957,491.92 and 87,107,913.89

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Solution

The fourth proportional to 261,999,426.62, 392,957,491.92 and 87,107,913.89 is: 130,648,023.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,999,426.62 : 392,957,491.92 = 87,107,913.89 : x
  2. Step 2: Convert to fraction form
    261,999,426.62/392,957,491.92 = 87,107,913.89/x
  3. Step 3: Cross multiply
    261,999,426.62x = 392,957,491.92 × 87,107,913.89
  4. Step 4: Simplify right side
    261,999,426.62x = 34,229,707,369,580,124
  5. Step 5: Solve for x
    x = 34,229,707,369,580,124/261,999,426.62
  6. Step 6: Final answer
    x = 130,648,023.97

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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.