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Finding the Fourth Proportional to 120,001.20, 180,001.80 and 67,513.20

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Solution

The fourth proportional to 120,001.20, 180,001.80 and 67,513.20 is: 101,269.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,001.20 : 180,001.80 = 67,513.20 : x
  2. Step 2: Convert to fraction form
    120,001.20/180,001.80 = 67,513.20/x
  3. Step 3: Cross multiply
    120,001.20x = 180,001.80 × 67,513.20
  4. Step 4: Simplify right side
    120,001.20x = 12,152,497,523.76
  5. Step 5: Solve for x
    x = 12,152,497,523.76/120,001.20
  6. Step 6: Final answer
    x = 101,269.80

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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.