Home / 128,144.88-176,899.68-85,731.12

Finding the Fourth Proportional to 128,144.88, 176,899.68 and 85,731.12

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Solution

The fourth proportional to 128,144.88, 176,899.68 and 85,731.12 is: 118,348.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,144.88 : 176,899.68 = 85,731.12 : x
  2. Step 2: Convert to fraction form
    128,144.88/176,899.68 = 85,731.12/x
  3. Step 3: Cross multiply
    128,144.88x = 176,899.68 × 85,731.12
  4. Step 4: Simplify right side
    128,144.88x = 15,165,807,694.04
  5. Step 5: Solve for x
    x = 15,165,807,694.04/128,144.88
  6. Step 6: Final answer
    x = 118,348.92

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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.