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Finding the Fourth Proportional to 87,818.80, 131,714.70 and 28,654.51

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Solution

The fourth proportional to 87,818.80, 131,714.70 and 28,654.51 is: 42,977.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,818.80 : 131,714.70 = 28,654.51 : x
  2. Step 2: Convert to fraction form
    87,818.80/131,714.70 = 28,654.51/x
  3. Step 3: Cross multiply
    87,818.80x = 131,714.70 × 28,654.51
  4. Step 4: Simplify right side
    87,818.80x = 3,774,220,188.30
  5. Step 5: Solve for x
    x = 3,774,220,188.30/87,818.80
  6. Step 6: Final answer
    x = 42,977.36

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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.