Home / 78,921.68-108,911.88-42,623.13

Finding the Fourth Proportional to 78,921.68, 108,911.88 and 42,623.13

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Solution

The fourth proportional to 78,921.68, 108,911.88 and 42,623.13 is: 58,819.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,921.68 : 108,911.88 = 42,623.13 : x
  2. Step 2: Convert to fraction form
    78,921.68/108,911.88 = 42,623.13/x
  3. Step 3: Cross multiply
    78,921.68x = 108,911.88 × 42,623.13
  4. Step 4: Simplify right side
    78,921.68x = 4,642,165,316.73
  5. Step 5: Solve for x
    x = 4,642,165,316.73/78,921.68
  6. Step 6: Final answer
    x = 58,819.90

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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.