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Finding the Fourth Proportional to 122,386.98, 168,865.25 and 71,369.13

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Solution

The fourth proportional to 122,386.98, 168,865.25 and 71,369.13 is: 98,472.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,386.98 : 168,865.25 = 71,369.13 : x
  2. Step 2: Convert to fraction form
    122,386.98/168,865.25 = 71,369.13/x
  3. Step 3: Cross multiply
    122,386.98x = 168,865.25 × 71,369.13
  4. Step 4: Simplify right side
    122,386.98x = 12,051,765,622.89
  5. Step 5: Solve for x
    x = 12,051,765,622.89/122,386.98
  6. Step 6: Final answer
    x = 98,472.61

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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.