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Finding the Fourth Proportional to 261,399.59, 391,941.22 and 117,279.02

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Solution

The fourth proportional to 261,399.59, 391,941.22 and 117,279.02 is: 175,847.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,399.59 : 391,941.22 = 117,279.02 : x
  2. Step 2: Convert to fraction form
    261,399.59/391,941.22 = 117,279.02/x
  3. Step 3: Cross multiply
    261,399.59x = 391,941.22 × 117,279.02
  4. Step 4: Simplify right side
    261,399.59x = 45,966,482,179.20
  5. Step 5: Solve for x
    x = 45,966,482,179.20/261,399.59
  6. Step 6: Final answer
    x = 175,847.57

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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.