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Finding the Fourth Proportional to 122,680.96, 169,298.88 and 69,688.96

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Solution

The fourth proportional to 122,680.96, 169,298.88 and 69,688.96 is: 96,170.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,680.96 : 169,298.88 = 69,688.96 : x
  2. Step 2: Convert to fraction form
    122,680.96/169,298.88 = 69,688.96/x
  3. Step 3: Cross multiply
    122,680.96x = 169,298.88 × 69,688.96
  4. Step 4: Simplify right side
    122,680.96x = 11,798,262,876.36
  5. Step 5: Solve for x
    x = 11,798,262,876.36/122,680.96
  6. Step 6: Final answer
    x = 96,170.28

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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.