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Finding the Fourth Proportional to 87,405.60, 131,140.80 and 34,852.80

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Solution

The fourth proportional to 87,405.60, 131,140.80 and 34,852.80 is: 52,292.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,405.60 : 131,140.80 = 34,852.80 : x
  2. Step 2: Convert to fraction form
    87,405.60/131,140.80 = 34,852.80/x
  3. Step 3: Cross multiply
    87,405.60x = 131,140.80 × 34,852.80
  4. Step 4: Simplify right side
    87,405.60x = 4,570,624,074.24
  5. Step 5: Solve for x
    x = 4,570,624,074.24/87,405.60
  6. Step 6: Final answer
    x = 52,292.12

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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.