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Finding the Fourth Proportional to 87,477.60, 131,313.60 and 54,235.20

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Solution

The fourth proportional to 87,477.60, 131,313.60 and 54,235.20 is: 81,413.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,477.60 : 131,313.60 = 54,235.20 : x
  2. Step 2: Convert to fraction form
    87,477.60/131,313.60 = 54,235.20/x
  3. Step 3: Cross multiply
    87,477.60x = 131,313.60 × 54,235.20
  4. Step 4: Simplify right side
    87,477.60x = 7,121,819,358.72
  5. Step 5: Solve for x
    x = 7,121,819,358.72/87,477.60
  6. Step 6: Final answer
    x = 81,413.06

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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.