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Finding the Fourth Proportional to 169,140.78, 253,734.84 and 69,315.15

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Solution

The fourth proportional to 169,140.78, 253,734.84 and 69,315.15 is: 103,982.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    169,140.78 : 253,734.84 = 69,315.15 : x
  2. Step 2: Convert to fraction form
    169,140.78/253,734.84 = 69,315.15/x
  3. Step 3: Cross multiply
    169,140.78x = 253,734.84 × 69,315.15
  4. Step 4: Simplify right side
    169,140.78x = 17,587,668,494.83
  5. Step 5: Solve for x
    x = 17,587,668,494.83/169,140.78
  6. Step 6: Final answer
    x = 103,982.43

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.