Home / 80,127.88-120,155.10-42,678.16

Finding the Fourth Proportional to 80,127.88, 120,155.10 and 42,678.16

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Solution

The fourth proportional to 80,127.88, 120,155.10 and 42,678.16 is: 63,997.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,127.88 : 120,155.10 = 42,678.16 : x
  2. Step 2: Convert to fraction form
    80,127.88/120,155.10 = 42,678.16/x
  3. Step 3: Cross multiply
    80,127.88x = 120,155.10 × 42,678.16
  4. Step 4: Simplify right side
    80,127.88x = 5,127,998,582.62
  5. Step 5: Solve for x
    x = 5,127,998,582.62/80,127.88
  6. Step 6: Final answer
    x = 63,997.68

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1.5x scale

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.