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Finding the Fourth Proportional to 87,920.40, 132,002.10 and 56,524.80

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Solution

The fourth proportional to 87,920.40, 132,002.10 and 56,524.80 is: 84,865.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,920.40 : 132,002.10 = 56,524.80 : x
  2. Step 2: Convert to fraction form
    87,920.40/132,002.10 = 56,524.80/x
  3. Step 3: Cross multiply
    87,920.40x = 132,002.10 × 56,524.80
  4. Step 4: Simplify right side
    87,920.40x = 7,461,392,302.08
  5. Step 5: Solve for x
    x = 7,461,392,302.08/87,920.40
  6. Step 6: Final answer
    x = 84,865.31

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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.