Home / 128,119.50-176,805.72-71,531.28

Finding the Fourth Proportional to 128,119.50, 176,805.72 and 71,531.28

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Solution

The fourth proportional to 128,119.50, 176,805.72 and 71,531.28 is: 98,713.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,119.50 : 176,805.72 = 71,531.28 : x
  2. Step 2: Convert to fraction form
    128,119.50/176,805.72 = 71,531.28/x
  3. Step 3: Cross multiply
    128,119.50x = 176,805.72 × 71,531.28
  4. Step 4: Simplify right side
    128,119.50x = 12,647,139,462.92
  5. Step 5: Solve for x
    x = 12,647,139,462.92/128,119.50
  6. Step 6: Final answer
    x = 98,713.62

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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.