Home / 128,592.72-177,451.80-71,228.18

Finding the Fourth Proportional to 128,592.72, 177,451.80 and 71,228.18

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Solution

The fourth proportional to 128,592.72, 177,451.80 and 71,228.18 is: 98,291.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,592.72 : 177,451.80 = 71,228.18 : x
  2. Step 2: Convert to fraction form
    128,592.72/177,451.80 = 71,228.18/x
  3. Step 3: Cross multiply
    128,592.72x = 177,451.80 × 71,228.18
  4. Step 4: Simplify right side
    128,592.72x = 12,639,568,751.72
  5. Step 5: Solve for x
    x = 12,639,568,751.72/128,592.72
  6. Step 6: Final answer
    x = 98,291.48

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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.