Home / 129,052.85-178,157.68-80,681.65

Finding the Fourth Proportional to 129,052.85, 178,157.68 and 80,681.65

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Solution

The fourth proportional to 129,052.85, 178,157.68 and 80,681.65 is: 111,381.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,052.85 : 178,157.68 = 80,681.65 : x
  2. Step 2: Convert to fraction form
    129,052.85/178,157.68 = 80,681.65/x
  3. Step 3: Cross multiply
    129,052.85x = 178,157.68 × 80,681.65
  4. Step 4: Simplify right side
    129,052.85x = 14,374,055,582.57
  5. Step 5: Solve for x
    x = 14,374,055,582.57/129,052.85
  6. Step 6: Final answer
    x = 111,381.16

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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.