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Finding the Fourth Proportional to 122,731.74, 169,368.72 and 69,015.60

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Solution

The fourth proportional to 122,731.74, 169,368.72 and 69,015.60 is: 95,240.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,731.74 : 169,368.72 = 69,015.60 : x
  2. Step 2: Convert to fraction form
    122,731.74/169,368.72 = 69,015.60/x
  3. Step 3: Cross multiply
    122,731.74x = 169,368.72 × 69,015.60
  4. Step 4: Simplify right side
    122,731.74x = 11,689,083,832.03
  5. Step 5: Solve for x
    x = 11,689,083,832.03/122,731.74
  6. Step 6: Final answer
    x = 95,240.92

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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.