Home / 78,336.20-117,581.10-38,937.80

Finding the Fourth Proportional to 78,336.20, 117,581.10 and 38,937.80

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Solution

The fourth proportional to 78,336.20, 117,581.10 and 38,937.80 is: 58,444.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,336.20 : 117,581.10 = 38,937.80 : x
  2. Step 2: Convert to fraction form
    78,336.20/117,581.10 = 38,937.80/x
  3. Step 3: Cross multiply
    78,336.20x = 117,581.10 × 38,937.80
  4. Step 4: Simplify right side
    78,336.20x = 4,578,349,355.58
  5. Step 5: Solve for x
    x = 4,578,349,355.58/78,336.20
  6. Step 6: Final answer
    x = 58,444.87

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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.