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Finding the Fourth Proportional to 157,559.34, 217,432.57 and 85,940.90

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Solution

The fourth proportional to 157,559.34, 217,432.57 and 85,940.90 is: 118,598.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,559.34 : 217,432.57 = 85,940.90 : x
  2. Step 2: Convert to fraction form
    157,559.34/217,432.57 = 85,940.90/x
  3. Step 3: Cross multiply
    157,559.34x = 217,432.57 × 85,940.90
  4. Step 4: Simplify right side
    157,559.34x = 18,686,350,067.05
  5. Step 5: Solve for x
    x = 18,686,350,067.05/157,559.34
  6. Step 6: Final answer
    x = 118,598.81

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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.