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Finding the Fourth Proportional to 122,799.69, 169,487.10 and 76,880.79

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Solution

The fourth proportional to 122,799.69, 169,487.10 and 76,880.79 is: 106,110.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,799.69 : 169,487.10 = 76,880.79 : x
  2. Step 2: Convert to fraction form
    122,799.69/169,487.10 = 76,880.79/x
  3. Step 3: Cross multiply
    122,799.69x = 169,487.10 × 76,880.79
  4. Step 4: Simplify right side
    122,799.69x = 13,030,302,142.81
  5. Step 5: Solve for x
    x = 13,030,302,142.81/122,799.69
  6. Step 6: Final answer
    x = 106,110.22

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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.