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Finding the Fourth Proportional to 80,956.80, 121,240.80 and 65,404.80

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Solution

The fourth proportional to 80,956.80, 121,240.80 and 65,404.80 is: 97,950.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,956.80 : 121,240.80 = 65,404.80 : x
  2. Step 2: Convert to fraction form
    80,956.80/121,240.80 = 65,404.80/x
  3. Step 3: Cross multiply
    80,956.80x = 121,240.80 × 65,404.80
  4. Step 4: Simplify right side
    80,956.80x = 7,929,730,275.84
  5. Step 5: Solve for x
    x = 7,929,730,275.84/80,956.80
  6. Step 6: Final answer
    x = 97,950.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.