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Finding the Fourth Proportional to 122,860.40, 169,552.81 and 69,148.90

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Solution

The fourth proportional to 122,860.40, 169,552.81 and 69,148.90 is: 95,428.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,860.40 : 169,552.81 = 69,148.90 : x
  2. Step 2: Convert to fraction form
    122,860.40/169,552.81 = 69,148.90/x
  3. Step 3: Cross multiply
    122,860.40x = 169,552.81 × 69,148.90
  4. Step 4: Simplify right side
    122,860.40x = 11,724,389,706.65
  5. Step 5: Solve for x
    x = 11,724,389,706.65/122,860.40
  6. Step 6: Final answer
    x = 95,428.55

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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.