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Finding the Fourth Proportional to 120,963.60, 181,402.20 and 42,080.40

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Solution

The fourth proportional to 120,963.60, 181,402.20 and 42,080.40 is: 63,105.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,963.60 : 181,402.20 = 42,080.40 : x
  2. Step 2: Convert to fraction form
    120,963.60/181,402.20 = 42,080.40/x
  3. Step 3: Cross multiply
    120,963.60x = 181,402.20 × 42,080.40
  4. Step 4: Simplify right side
    120,963.60x = 7,633,477,136.88
  5. Step 5: Solve for x
    x = 7,633,477,136.88/120,963.60
  6. Step 6: Final answer
    x = 63,105.57

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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.