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Finding the Fourth Proportional to 87,043.40, 130,413.90 and 40,200.20

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Solution

The fourth proportional to 87,043.40, 130,413.90 and 40,200.20 is: 60,230.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,043.40 : 130,413.90 = 40,200.20 : x
  2. Step 2: Convert to fraction form
    87,043.40/130,413.90 = 40,200.20/x
  3. Step 3: Cross multiply
    87,043.40x = 130,413.90 × 40,200.20
  4. Step 4: Simplify right side
    87,043.40x = 5,242,664,862.78
  5. Step 5: Solve for x
    x = 5,242,664,862.78/87,043.40
  6. Step 6: Final answer
    x = 60,230.47

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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.