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Finding the Fourth Proportional to 157,599.46, 217,486.78 and 85,978.97

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Solution

The fourth proportional to 157,599.46, 217,486.78 and 85,978.97 is: 118,650.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,599.46 : 217,486.78 = 85,978.97 : x
  2. Step 2: Convert to fraction form
    157,599.46/217,486.78 = 85,978.97/x
  3. Step 3: Cross multiply
    157,599.46x = 217,486.78 × 85,978.97
  4. Step 4: Simplify right side
    157,599.46x = 18,699,289,333.02
  5. Step 5: Solve for x
    x = 18,699,289,333.02/157,599.46
  6. Step 6: Final answer
    x = 118,650.72

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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.