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Finding the Fourth Proportional to 157,390.75, 217,199.27 and 85,770.79

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Solution

The fourth proportional to 157,390.75, 217,199.27 and 85,770.79 is: 118,363.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,390.75 : 217,199.27 = 85,770.79 : x
  2. Step 2: Convert to fraction form
    157,390.75/217,199.27 = 85,770.79/x
  3. Step 3: Cross multiply
    157,390.75x = 217,199.27 × 85,770.79
  4. Step 4: Simplify right side
    157,390.75x = 18,629,352,646.75
  5. Step 5: Solve for x
    x = 18,629,352,646.75/157,390.75
  6. Step 6: Final answer
    x = 118,363.71

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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.