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Finding the Fourth Proportional to 157,357.42, 217,155.72 and 85,737.44

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Solution

The fourth proportional to 157,357.42, 217,155.72 and 85,737.44 is: 118,319.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,357.42 : 217,155.72 = 85,737.44 : x
  2. Step 2: Convert to fraction form
    157,357.42/217,155.72 = 85,737.44/x
  3. Step 3: Cross multiply
    157,357.42x = 217,155.72 × 85,737.44
  4. Step 4: Simplify right side
    157,357.42x = 18,618,375,514.16
  5. Step 5: Solve for x
    x = 18,618,375,514.16/157,357.42
  6. Step 6: Final answer
    x = 118,319.02

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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.