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Finding the Fourth Proportional to 157,380.10, 217,181.70 and 85,760.70

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Solution

The fourth proportional to 157,380.10, 217,181.70 and 85,760.70 is: 118,348.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,380.10 : 217,181.70 = 85,760.70 : x
  2. Step 2: Convert to fraction form
    157,380.10/217,181.70 = 85,760.70/x
  3. Step 3: Cross multiply
    157,380.10x = 217,181.70 × 85,760.70
  4. Step 4: Simplify right side
    157,380.10x = 18,625,654,619.19
  5. Step 5: Solve for x
    x = 18,625,654,619.19/157,380.10
  6. Step 6: Final answer
    x = 118,348.22

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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.