Home / 128,031.62-176,683.83-71,441.78

Finding the Fourth Proportional to 128,031.62, 176,683.83 and 71,441.78

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Solution

The fourth proportional to 128,031.62, 176,683.83 and 71,441.78 is: 98,589.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,031.62 : 176,683.83 = 71,441.78 : x
  2. Step 2: Convert to fraction form
    128,031.62/176,683.83 = 71,441.78/x
  3. Step 3: Cross multiply
    128,031.62x = 176,683.83 × 71,441.78
  4. Step 4: Simplify right side
    128,031.62x = 12,622,607,312.42
  5. Step 5: Solve for x
    x = 12,622,607,312.42/128,031.62
  6. Step 6: Final answer
    x = 98,589.76

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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.