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Finding the Fourth Proportional to 261,053.40, 391,272.90 and 136,330.20

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Solution

The fourth proportional to 261,053.40, 391,272.90 and 136,330.20 is: 204,334.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,053.40 : 391,272.90 = 136,330.20 : x
  2. Step 2: Convert to fraction form
    261,053.40/391,272.90 = 136,330.20/x
  3. Step 3: Cross multiply
    261,053.40x = 391,272.90 × 136,330.20
  4. Step 4: Simplify right side
    261,053.40x = 53,342,312,711.58
  5. Step 5: Solve for x
    x = 53,342,312,711.58/261,053.40
  6. Step 6: Final answer
    x = 204,334.87

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.