Home / 128,125.20-176,812.88-71,536.56

Finding the Fourth Proportional to 128,125.20, 176,812.88 and 71,536.56

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Solution

The fourth proportional to 128,125.20, 176,812.88 and 71,536.56 is: 98,720.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,125.20 : 176,812.88 = 71,536.56 : x
  2. Step 2: Convert to fraction form
    128,125.20/176,812.88 = 71,536.56/x
  3. Step 3: Cross multiply
    128,125.20x = 176,812.88 × 71,536.56
  4. Step 4: Simplify right side
    128,125.20x = 12,648,585,198.89
  5. Step 5: Solve for x
    x = 12,648,585,198.89/128,125.20
  6. Step 6: Final answer
    x = 98,720.51

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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.