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Finding the Fourth Proportional to 261,008.64, 391,575.12 and 92,543.64

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Solution

The fourth proportional to 261,008.64, 391,575.12 and 92,543.64 is: 138,837.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,008.64 : 391,575.12 = 92,543.64 : x
  2. Step 2: Convert to fraction form
    261,008.64/391,575.12 = 92,543.64/x
  3. Step 3: Cross multiply
    261,008.64x = 391,575.12 × 92,543.64
  4. Step 4: Simplify right side
    261,008.64x = 36,237,786,938.24
  5. Step 5: Solve for x
    x = 36,237,786,938.24/261,008.64
  6. Step 6: Final answer
    x = 138,837.50

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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.