Home / 80,904.20-121,385.10-78,024.20

Finding the Fourth Proportional to 80,904.20, 121,385.10 and 78,024.20

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Solution

The fourth proportional to 80,904.20, 121,385.10 and 78,024.20 is: 117,064.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,904.20 : 121,385.10 = 78,024.20 : x
  2. Step 2: Convert to fraction form
    80,904.20/121,385.10 = 78,024.20/x
  3. Step 3: Cross multiply
    80,904.20x = 121,385.10 × 78,024.20
  4. Step 4: Simplify right side
    80,904.20x = 9,470,975,319.42
  5. Step 5: Solve for x
    x = 9,470,975,319.42/80,904.20
  6. Step 6: Final answer
    x = 117,064.07

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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.