Home / 80,901.90-121,789.62-72,764.10

Finding the Fourth Proportional to 80,901.90, 121,789.62 and 72,764.10

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Solution

The fourth proportional to 80,901.90, 121,789.62 and 72,764.10 is: 109,538.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,901.90 : 121,789.62 = 72,764.10 : x
  2. Step 2: Convert to fraction form
    80,901.90/121,789.62 = 72,764.10/x
  3. Step 3: Cross multiply
    80,901.90x = 121,789.62 × 72,764.10
  4. Step 4: Simplify right side
    80,901.90x = 8,861,912,088.64
  5. Step 5: Solve for x
    x = 8,861,912,088.64/80,901.90
  6. Step 6: Final answer
    x = 109,538.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.