Home / 87,619.60-131,429.40-72,845.20

Finding the Fourth Proportional to 87,619.60, 131,429.40 and 72,845.20

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Solution

The fourth proportional to 87,619.60, 131,429.40 and 72,845.20 is: 109,267.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,619.60 : 131,429.40 = 72,845.20 : x
  2. Step 2: Convert to fraction form
    87,619.60/131,429.40 = 72,845.20/x
  3. Step 3: Cross multiply
    87,619.60x = 131,429.40 × 72,845.20
  4. Step 4: Simplify right side
    87,619.60x = 9,574,000,928.88
  5. Step 5: Solve for x
    x = 9,574,000,928.88/87,619.60
  6. Step 6: Final answer
    x = 109,267.80

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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.