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Finding the Fourth Proportional to 87,605.40, 131,408.10 and 77,928.60

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Solution

The fourth proportional to 87,605.40, 131,408.10 and 77,928.60 is: 116,892.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,605.40 : 131,408.10 = 77,928.60 : x
  2. Step 2: Convert to fraction form
    87,605.40/131,408.10 = 77,928.60/x
  3. Step 3: Cross multiply
    87,605.40x = 131,408.10 × 77,928.60
  4. Step 4: Simplify right side
    87,605.40x = 10,240,449,261.66
  5. Step 5: Solve for x
    x = 10,240,449,261.66/87,605.40
  6. Step 6: Final answer
    x = 116,892.90

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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.