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Finding the Fourth Proportional to 138,662.70, 207,702.45 and 115,334.70

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Solution

The fourth proportional to 138,662.70, 207,702.45 and 115,334.70 is: 172,759.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,662.70 : 207,702.45 = 115,334.70 : x
  2. Step 2: Convert to fraction form
    138,662.70/207,702.45 = 115,334.70/x
  3. Step 3: Cross multiply
    138,662.70x = 207,702.45 × 115,334.70
  4. Step 4: Simplify right side
    138,662.70x = 23,955,299,760.02
  5. Step 5: Solve for x
    x = 23,955,299,760.02/138,662.70
  6. Step 6: Final answer
    x = 172,759.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.