Home / 128,029.12-176,680.38-71,440.66

Finding the Fourth Proportional to 128,029.12, 176,680.38 and 71,440.66

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Solution

The fourth proportional to 128,029.12, 176,680.38 and 71,440.66 is: 98,588.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,029.12 : 176,680.38 = 71,440.66 : x
  2. Step 2: Convert to fraction form
    128,029.12/176,680.38 = 71,440.66/x
  3. Step 3: Cross multiply
    128,029.12x = 176,680.38 × 71,440.66
  4. Step 4: Simplify right side
    128,029.12x = 12,622,162,956.25
  5. Step 5: Solve for x
    x = 12,622,162,956.25/128,029.12
  6. Step 6: Final answer
    x = 98,588.22

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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.