Home / 78,713.49-108,621.45-42,902.76

Finding the Fourth Proportional to 78,713.49, 108,621.45 and 42,902.76

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Solution

The fourth proportional to 78,713.49, 108,621.45 and 42,902.76 is: 59,204.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,713.49 : 108,621.45 = 42,902.76 : x
  2. Step 2: Convert to fraction form
    78,713.49/108,621.45 = 42,902.76/x
  3. Step 3: Cross multiply
    78,713.49x = 108,621.45 × 42,902.76
  4. Step 4: Simplify right side
    78,713.49x = 4,660,160,000.20
  5. Step 5: Solve for x
    x = 4,660,160,000.20/78,713.49
  6. Step 6: Final answer
    x = 59,204.08

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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.