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Finding the Fourth Proportional to 239,760.47, 359,640.61 and 71,280.07

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Solution

The fourth proportional to 239,760.47, 359,640.61 and 71,280.07 is: 106,920.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,760.47 : 359,640.61 = 71,280.07 : x
  2. Step 2: Convert to fraction form
    239,760.47/359,640.61 = 71,280.07/x
  3. Step 3: Cross multiply
    239,760.47x = 359,640.61 × 71,280.07
  4. Step 4: Simplify right side
    239,760.47x = 25,635,206,778.34
  5. Step 5: Solve for x
    x = 25,635,206,778.34/239,760.47
  6. Step 6: Final answer
    x = 106,920.07

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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.