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Finding the Fourth Proportional to 138,320.60, 207,675.30 and 85,832.60

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Solution

The fourth proportional to 138,320.60, 207,675.30 and 85,832.60 is: 128,869.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,320.60 : 207,675.30 = 85,832.60 : x
  2. Step 2: Convert to fraction form
    138,320.60/207,675.30 = 85,832.60/x
  3. Step 3: Cross multiply
    138,320.60x = 207,675.30 × 85,832.60
  4. Step 4: Simplify right side
    138,320.60x = 17,825,310,954.78
  5. Step 5: Solve for x
    x = 17,825,310,954.78/138,320.60
  6. Step 6: Final answer
    x = 128,869.53

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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.