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Finding the Fourth Proportional to 157,759.66, 217,707.24 and 86,139.64

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Solution

The fourth proportional to 157,759.66, 217,707.24 and 86,139.64 is: 118,872.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,759.66 : 217,707.24 = 86,139.64 : x
  2. Step 2: Convert to fraction form
    157,759.66/217,707.24 = 86,139.64/x
  3. Step 3: Cross multiply
    157,759.66x = 217,707.24 × 86,139.64
  4. Step 4: Simplify right side
    157,759.66x = 18,753,223,278.99
  5. Step 5: Solve for x
    x = 18,753,223,278.99/157,759.66
  6. Step 6: Final answer
    x = 118,872.11

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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.