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Finding the Fourth Proportional to 121,846, 168,166.92 and 71,535.28

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Solution

The fourth proportional to 121,846, 168,166.92 and 71,535.28 is: 98,730.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,846 : 168,166.92 = 71,535.28 : x
  2. Step 2: Convert to fraction form
    121,846/168,166.92 = 71,535.28/x
  3. Step 3: Cross multiply
    121,846x = 168,166.92 × 71,535.28
  4. Step 4: Simplify right side
    121,846x = 12,029,867,708.94
  5. Step 5: Solve for x
    x = 12,029,867,708.94/121,846
  6. Step 6: Final answer
    x = 98,730.10

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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.