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Finding the Fourth Proportional to 136,041.60, 204,062.40 and 85,959.30

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Solution

The fourth proportional to 136,041.60, 204,062.40 and 85,959.30 is: 128,938.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,041.60 : 204,062.40 = 85,959.30 : x
  2. Step 2: Convert to fraction form
    136,041.60/204,062.40 = 85,959.30/x
  3. Step 3: Cross multiply
    136,041.60x = 204,062.40 × 85,959.30
  4. Step 4: Simplify right side
    136,041.60x = 17,541,061,060.32
  5. Step 5: Solve for x
    x = 17,541,061,060.32/136,041.60
  6. Step 6: Final answer
    x = 128,938.95

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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.