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Finding the Fourth Proportional to 261,414.60, 392,251.62 and 103,639.56

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Solution

The fourth proportional to 261,414.60, 392,251.62 and 103,639.56 is: 155,510.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,414.60 : 392,251.62 = 103,639.56 : x
  2. Step 2: Convert to fraction form
    261,414.60/392,251.62 = 103,639.56/x
  3. Step 3: Cross multiply
    261,414.60x = 392,251.62 × 103,639.56
  4. Step 4: Simplify right side
    261,414.60x = 40,652,785,306.09
  5. Step 5: Solve for x
    x = 40,652,785,306.09/261,414.60
  6. Step 6: Final answer
    x = 155,510.77

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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.