Home / 157,411.20-217,221.08-85,789.65

Finding the Fourth Proportional to 157,411.20, 217,221.08 and 85,789.65

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Solution

The fourth proportional to 157,411.20, 217,221.08 and 85,789.65 is: 118,386.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,411.20 : 217,221.08 = 85,789.65 : x
  2. Step 2: Convert to fraction form
    157,411.20/217,221.08 = 85,789.65/x
  3. Step 3: Cross multiply
    157,411.20x = 217,221.08 × 85,789.65
  4. Step 4: Simplify right side
    157,411.20x = 18,635,319,996.87
  5. Step 5: Solve for x
    x = 18,635,319,996.87/157,411.20
  6. Step 6: Final answer
    x = 118,386.24

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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.