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Finding the Fourth Proportional to 261,635.57, 392,461.05 and 72,098.81

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Solution

The fourth proportional to 261,635.57, 392,461.05 and 72,098.81 is: 108,150.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,635.57 : 392,461.05 = 72,098.81 : x
  2. Step 2: Convert to fraction form
    261,635.57/392,461.05 = 72,098.81/x
  3. Step 3: Cross multiply
    261,635.57x = 392,461.05 × 72,098.81
  4. Step 4: Simplify right side
    261,635.57x = 28,295,974,676.35
  5. Step 5: Solve for x
    x = 28,295,974,676.35/261,635.57
  6. Step 6: Final answer
    x = 108,150.34

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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.