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Finding the Fourth Proportional to 83,280.40, 124,978.20 and 59,923.60

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Solution

The fourth proportional to 83,280.40, 124,978.20 and 59,923.60 is: 89,926.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,280.40 : 124,978.20 = 59,923.60 : x
  2. Step 2: Convert to fraction form
    83,280.40/124,978.20 = 59,923.60/x
  3. Step 3: Cross multiply
    83,280.40x = 124,978.20 × 59,923.60
  4. Step 4: Simplify right side
    83,280.40x = 7,489,143,665.52
  5. Step 5: Solve for x
    x = 7,489,143,665.52/83,280.40
  6. Step 6: Final answer
    x = 89,926.85

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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.