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Finding the Fourth Proportional to 159,658.40, 239,487.60 and 120,000.80

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Solution

The fourth proportional to 159,658.40, 239,487.60 and 120,000.80 is: 180,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,658.40 : 239,487.60 = 120,000.80 : x
  2. Step 2: Convert to fraction form
    159,658.40/239,487.60 = 120,000.80/x
  3. Step 3: Cross multiply
    159,658.40x = 239,487.60 × 120,000.80
  4. Step 4: Simplify right side
    159,658.40x = 28,738,703,590.08
  5. Step 5: Solve for x
    x = 28,738,703,590.08/159,658.40
  6. Step 6: Final answer
    x = 180,001.20

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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.