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Finding the Fourth Proportional to 87,503.58, 120,712.92 and 57,275.58

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Solution

The fourth proportional to 87,503.58, 120,712.92 and 57,275.58 is: 79,012.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,503.58 : 120,712.92 = 57,275.58 : x
  2. Step 2: Convert to fraction form
    87,503.58/120,712.92 = 57,275.58/x
  3. Step 3: Cross multiply
    87,503.58x = 120,712.92 × 57,275.58
  4. Step 4: Simplify right side
    87,503.58x = 6,913,902,506.49
  5. Step 5: Solve for x
    x = 6,913,902,506.49/87,503.58
  6. Step 6: Final answer
    x = 79,012.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.