Home / 78,360.20-117,617.10-38,961.80

Finding the Fourth Proportional to 78,360.20, 117,617.10 and 38,961.80

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Solution

The fourth proportional to 78,360.20, 117,617.10 and 38,961.80 is: 58,480.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,360.20 : 117,617.10 = 38,961.80 : x
  2. Step 2: Convert to fraction form
    78,360.20/117,617.10 = 38,961.80/x
  3. Step 3: Cross multiply
    78,360.20x = 117,617.10 × 38,961.80
  4. Step 4: Simplify right side
    78,360.20x = 4,582,573,926.78
  5. Step 5: Solve for x
    x = 4,582,573,926.78/78,360.20
  6. Step 6: Final answer
    x = 58,480.89

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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.