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Finding the Fourth Proportional to 129,172.80, 193,764.60 and 69,176.10

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Solution

The fourth proportional to 129,172.80, 193,764.60 and 69,176.10 is: 103,767.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,172.80 : 193,764.60 = 69,176.10 : x
  2. Step 2: Convert to fraction form
    129,172.80/193,764.60 = 69,176.10/x
  3. Step 3: Cross multiply
    129,172.80x = 193,764.60 × 69,176.10
  4. Step 4: Simplify right side
    129,172.80x = 13,403,879,346.06
  5. Step 5: Solve for x
    x = 13,403,879,346.06/129,172.80
  6. Step 6: Final answer
    x = 103,767.04

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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.