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Finding the Fourth Proportional to 120,459.53, 180,569.01 and 80,512.16

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Solution

The fourth proportional to 120,459.53, 180,569.01 and 80,512.16 is: 120,687.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,459.53 : 180,569.01 = 80,512.16 : x
  2. Step 2: Convert to fraction form
    120,459.53/180,569.01 = 80,512.16/x
  3. Step 3: Cross multiply
    120,459.53x = 180,569.01 × 80,512.16
  4. Step 4: Simplify right side
    120,459.53x = 14,538,001,024.16
  5. Step 5: Solve for x
    x = 14,538,001,024.16/120,459.53
  6. Step 6: Final answer
    x = 120,687.84

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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.