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Finding the Fourth Proportional to 132,963.15, 199,278.65 and 85,451.79

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Solution

The fourth proportional to 132,963.15, 199,278.65 and 85,451.79 is: 128,070.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,963.15 : 199,278.65 = 85,451.79 : x
  2. Step 2: Convert to fraction form
    132,963.15/199,278.65 = 85,451.79/x
  3. Step 3: Cross multiply
    132,963.15x = 199,278.65 × 85,451.79
  4. Step 4: Simplify right side
    132,963.15x = 17,028,716,354.89
  5. Step 5: Solve for x
    x = 17,028,716,354.89/132,963.15
  6. Step 6: Final answer
    x = 128,070.95

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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.