Home / 103,141.65-142,304.25-66,785.61

Finding the Fourth Proportional to 103,141.65, 142,304.25 and 66,785.61

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Solution

The fourth proportional to 103,141.65, 142,304.25 and 66,785.61 is: 92,143.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,141.65 : 142,304.25 = 66,785.61 : x
  2. Step 2: Convert to fraction form
    103,141.65/142,304.25 = 66,785.61/x
  3. Step 3: Cross multiply
    103,141.65x = 142,304.25 × 66,785.61
  4. Step 4: Simplify right side
    103,141.65x = 9,503,876,141.84
  5. Step 5: Solve for x
    x = 9,503,876,141.84/103,141.65
  6. Step 6: Final answer
    x = 92,143.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.