Home / 129,345.85-178,496.62-72,757.63

Finding the Fourth Proportional to 129,345.85, 178,496.62 and 72,757.63

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Solution

The fourth proportional to 129,345.85, 178,496.62 and 72,757.63 is: 100,405.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,345.85 : 178,496.62 = 72,757.63 : x
  2. Step 2: Convert to fraction form
    129,345.85/178,496.62 = 72,757.63/x
  3. Step 3: Cross multiply
    129,345.85x = 178,496.62 × 72,757.63
  4. Step 4: Simplify right side
    129,345.85x = 12,986,991,034.21
  5. Step 5: Solve for x
    x = 12,986,991,034.21/129,345.85
  6. Step 6: Final answer
    x = 100,405.16

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1.5x scale

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.