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Finding the Fourth Proportional to 157,963.24, 217,989.72 and 86,344.12

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Solution

The fourth proportional to 157,963.24, 217,989.72 and 86,344.12 is: 119,155.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    157,963.24 : 217,989.72 = 86,344.12 : x
  2. Step 2: Convert to fraction form
    157,963.24/217,989.72 = 86,344.12/x
  3. Step 3: Cross multiply
    157,963.24x = 217,989.72 × 86,344.12
  4. Step 4: Simplify right side
    157,963.24x = 18,822,130,542.45
  5. Step 5: Solve for x
    x = 18,822,130,542.45/157,963.24
  6. Step 6: Final answer
    x = 119,155.13

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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.