Home / 78,811.20-108,759.96-43,001.28

Finding the Fourth Proportional to 78,811.20, 108,759.96 and 43,001.28

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Solution

The fourth proportional to 78,811.20, 108,759.96 and 43,001.28 is: 59,342.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,811.20 : 108,759.96 = 43,001.28 : x
  2. Step 2: Convert to fraction form
    78,811.20/108,759.96 = 43,001.28/x
  3. Step 3: Cross multiply
    78,811.20x = 108,759.96 × 43,001.28
  4. Step 4: Simplify right side
    78,811.20x = 4,676,817,492.75
  5. Step 5: Solve for x
    x = 4,676,817,492.75/78,811.20
  6. Step 6: Final answer
    x = 59,342.04

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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.