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Finding the Fourth Proportional to 136,956.60, 205,434.90 and 99,340.20

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Solution

The fourth proportional to 136,956.60, 205,434.90 and 99,340.20 is: 149,010.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,956.60 : 205,434.90 = 99,340.20 : x
  2. Step 2: Convert to fraction form
    136,956.60/205,434.90 = 99,340.20/x
  3. Step 3: Cross multiply
    136,956.60x = 205,434.90 × 99,340.20
  4. Step 4: Simplify right side
    136,956.60x = 20,407,944,052.98
  5. Step 5: Solve for x
    x = 20,407,944,052.98/136,956.60
  6. Step 6: Final answer
    x = 149,010.30

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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.