Home / 128,439.92-177,247.59-71,851.34

Finding the Fourth Proportional to 128,439.92, 177,247.59 and 71,851.34

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Solution

The fourth proportional to 128,439.92, 177,247.59 and 71,851.34 is: 99,155.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,439.92 : 177,247.59 = 71,851.34 : x
  2. Step 2: Convert to fraction form
    128,439.92/177,247.59 = 71,851.34/x
  3. Step 3: Cross multiply
    128,439.92x = 177,247.59 × 71,851.34
  4. Step 4: Simplify right side
    128,439.92x = 12,735,476,853.27
  5. Step 5: Solve for x
    x = 12,735,476,853.27/128,439.92
  6. Step 6: Final answer
    x = 99,155.13

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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.