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Finding the Fourth Proportional to 122,988.90, 169,740.96 and 69,284.54

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Solution

The fourth proportional to 122,988.90, 169,740.96 and 69,284.54 is: 95,621.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,988.90 : 169,740.96 = 69,284.54 : x
  2. Step 2: Convert to fraction form
    122,988.90/169,740.96 = 69,284.54/x
  3. Step 3: Cross multiply
    122,988.90x = 169,740.96 × 69,284.54
  4. Step 4: Simplify right side
    122,988.90x = 11,760,424,332.76
  5. Step 5: Solve for x
    x = 11,760,424,332.76/122,988.90
  6. Step 6: Final answer
    x = 95,621.84

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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.