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Finding the Fourth Proportional to 261,038.59, 391,447.16 and 92,601.31

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Solution

The fourth proportional to 261,038.59, 391,447.16 and 92,601.31 is: 138,862.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,038.59 : 391,447.16 = 92,601.31 : x
  2. Step 2: Convert to fraction form
    261,038.59/391,447.16 = 92,601.31/x
  3. Step 3: Cross multiply
    261,038.59x = 391,447.16 × 92,601.31
  4. Step 4: Simplify right side
    261,038.59x = 36,248,519,811.78
  5. Step 5: Solve for x
    x = 36,248,519,811.78/261,038.59
  6. Step 6: Final answer
    x = 138,862.69

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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.