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Finding the Fourth Proportional to 157,387.22, 217,188.04 and 85,765.71

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Solution

The fourth proportional to 157,387.22, 217,188.04 and 85,765.71 is: 118,353.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,387.22 : 217,188.04 = 85,765.71 : x
  2. Step 2: Convert to fraction form
    157,387.22/217,188.04 = 85,765.71/x
  3. Step 3: Cross multiply
    157,387.22x = 217,188.04 × 85,765.71
  4. Step 4: Simplify right side
    157,387.22x = 18,627,286,454.11
  5. Step 5: Solve for x
    x = 18,627,286,454.11/157,387.22
  6. Step 6: Final answer
    x = 118,353.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.