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Finding the Fourth Proportional to 122,756.96, 169,390.80 and 69,040.82

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Solution

The fourth proportional to 122,756.96, 169,390.80 and 69,040.82 is: 95,268.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,756.96 : 169,390.80 = 69,040.82 : x
  2. Step 2: Convert to fraction form
    122,756.96/169,390.80 = 69,040.82/x
  3. Step 3: Cross multiply
    122,756.96x = 169,390.80 × 69,040.82
  4. Step 4: Simplify right side
    122,756.96x = 11,694,878,885.50
  5. Step 5: Solve for x
    x = 11,694,878,885.50/122,756.96
  6. Step 6: Final answer
    x = 95,268.56

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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.