Home / 78,587.28-108,449.82-42,777.18

Finding the Fourth Proportional to 78,587.28, 108,449.82 and 42,777.18

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Solution

The fourth proportional to 78,587.28, 108,449.82 and 42,777.18 is: 59,032.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,587.28 : 108,449.82 = 42,777.18 : x
  2. Step 2: Convert to fraction form
    78,587.28/108,449.82 = 42,777.18/x
  3. Step 3: Cross multiply
    78,587.28x = 108,449.82 × 42,777.18
  4. Step 4: Simplify right side
    78,587.28x = 4,639,177,471.11
  5. Step 5: Solve for x
    x = 4,639,177,471.11/78,587.28
  6. Step 6: Final answer
    x = 59,032.17

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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.