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Finding the Fourth Proportional to 124,658.18, 172,005.63 and 73,679.48

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Solution

The fourth proportional to 124,658.18, 172,005.63 and 73,679.48 is: 101,664.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,658.18 : 172,005.63 = 73,679.48 : x
  2. Step 2: Convert to fraction form
    124,658.18/172,005.63 = 73,679.48/x
  3. Step 3: Cross multiply
    124,658.18x = 172,005.63 × 73,679.48
  4. Step 4: Simplify right side
    124,658.18x = 12,673,285,375.47
  5. Step 5: Solve for x
    x = 12,673,285,375.47/124,658.18
  6. Step 6: Final answer
    x = 101,664.29

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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.