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Finding the Fourth Proportional to 122,812, 169,480.56 and 69,820

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Solution

The fourth proportional to 122,812, 169,480.56 and 69,820 is: 96,351.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,812 : 169,480.56 = 69,820 : x
  2. Step 2: Convert to fraction form
    122,812/169,480.56 = 69,820/x
  3. Step 3: Cross multiply
    122,812x = 169,480.56 × 69,820
  4. Step 4: Simplify right side
    122,812x = 11,833,132,699.20
  5. Step 5: Solve for x
    x = 11,833,132,699.20/122,812
  6. Step 6: Final answer
    x = 96,351.60

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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.