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Finding the Fourth Proportional to 80,001.20, 120,001.80 and 76,113.20

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Solution

The fourth proportional to 80,001.20, 120,001.80 and 76,113.20 is: 114,169.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,001.20 : 120,001.80 = 76,113.20 : x
  2. Step 2: Convert to fraction form
    80,001.20/120,001.80 = 76,113.20/x
  3. Step 3: Cross multiply
    80,001.20x = 120,001.80 × 76,113.20
  4. Step 4: Simplify right side
    80,001.20x = 9,133,721,003.76
  5. Step 5: Solve for x
    x = 9,133,721,003.76/80,001.20
  6. Step 6: Final answer
    x = 114,169.80

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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.