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Finding the Fourth Proportional to 87,666.66, 120,978.18 and 49,426.29

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Solution

The fourth proportional to 87,666.66, 120,978.18 and 49,426.29 is: 68,207.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,666.66 : 120,978.18 = 49,426.29 : x
  2. Step 2: Convert to fraction form
    87,666.66/120,978.18 = 49,426.29/x
  3. Step 3: Cross multiply
    87,666.66x = 120,978.18 × 49,426.29
  4. Step 4: Simplify right side
    87,666.66x = 5,979,502,608.35
  5. Step 5: Solve for x
    x = 5,979,502,608.35/87,666.66
  6. Step 6: Final answer
    x = 68,207.26

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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.