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Finding the Fourth Proportional to 87,903.60, 131,855.40 and 54,661.20

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Solution

The fourth proportional to 87,903.60, 131,855.40 and 54,661.20 is: 81,991.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,903.60 : 131,855.40 = 54,661.20 : x
  2. Step 2: Convert to fraction form
    87,903.60/131,855.40 = 54,661.20/x
  3. Step 3: Cross multiply
    87,903.60x = 131,855.40 × 54,661.20
  4. Step 4: Simplify right side
    87,903.60x = 7,207,374,390.48
  5. Step 5: Solve for x
    x = 7,207,374,390.48/87,903.60
  6. Step 6: Final answer
    x = 81,991.80

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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.