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Finding the Fourth Proportional to 71,891.40, 107,304.84 and 67,459.08

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Solution

The fourth proportional to 71,891.40, 107,304.84 and 67,459.08 is: 100,689.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,891.40 : 107,304.84 = 67,459.08 : x
  2. Step 2: Convert to fraction form
    71,891.40/107,304.84 = 67,459.08/x
  3. Step 3: Cross multiply
    71,891.40x = 107,304.84 × 67,459.08
  4. Step 4: Simplify right side
    71,891.40x = 7,238,685,785.95
  5. Step 5: Solve for x
    x = 7,238,685,785.95/71,891.40
  6. Step 6: Final answer
    x = 100,689.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.