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Finding the Fourth Proportional to 87,449.60, 130,977.04 and 61,271.20

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Solution

The fourth proportional to 87,449.60, 130,977.04 and 61,271.20 is: 91,768.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,449.60 : 130,977.04 = 61,271.20 : x
  2. Step 2: Convert to fraction form
    87,449.60/130,977.04 = 61,271.20/x
  3. Step 3: Cross multiply
    87,449.60x = 130,977.04 × 61,271.20
  4. Step 4: Simplify right side
    87,449.60x = 8,025,120,413.25
  5. Step 5: Solve for x
    x = 8,025,120,413.25/87,449.60
  6. Step 6: Final answer
    x = 91,768.52

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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.