Home / 78,439.28-108,244.62-42,630.19

Finding the Fourth Proportional to 78,439.28, 108,244.62 and 42,630.19

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Solution

The fourth proportional to 78,439.28, 108,244.62 and 42,630.19 is: 58,828.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,439.28 : 108,244.62 = 42,630.19 : x
  2. Step 2: Convert to fraction form
    78,439.28/108,244.62 = 42,630.19/x
  3. Step 3: Cross multiply
    78,439.28x = 108,244.62 × 42,630.19
  4. Step 4: Simplify right side
    78,439.28x = 4,614,488,446.47
  5. Step 5: Solve for x
    x = 4,614,488,446.47/78,439.28
  6. Step 6: Final answer
    x = 58,828.80

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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.