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Finding the Fourth Proportional to 136,038.60, 204,057.90 and 85,956.30

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Solution

The fourth proportional to 136,038.60, 204,057.90 and 85,956.30 is: 128,934.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,038.60 : 204,057.90 = 85,956.30 : x
  2. Step 2: Convert to fraction form
    136,038.60/204,057.90 = 85,956.30/x
  3. Step 3: Cross multiply
    136,038.60x = 204,057.90 × 85,956.30
  4. Step 4: Simplify right side
    136,038.60x = 17,540,062,069.77
  5. Step 5: Solve for x
    x = 17,540,062,069.77/136,038.60
  6. Step 6: Final answer
    x = 128,934.45

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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.