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Finding the Fourth Proportional to 87,009.31, 130,381.11 and 64,714.87

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Solution

The fourth proportional to 87,009.31, 130,381.11 and 64,714.87 is: 96,973.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,009.31 : 130,381.11 = 64,714.87 : x
  2. Step 2: Convert to fraction form
    87,009.31/130,381.11 = 64,714.87/x
  3. Step 3: Cross multiply
    87,009.31x = 130,381.11 × 64,714.87
  4. Step 4: Simplify right side
    87,009.31x = 8,437,596,584.11
  5. Step 5: Solve for x
    x = 8,437,596,584.11/87,009.31
  6. Step 6: Final answer
    x = 96,973.49

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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.