Home / 128,120.24-176,814.16-71,531.60

Finding the Fourth Proportional to 128,120.24, 176,814.16 and 71,531.60

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Solution

The fourth proportional to 128,120.24, 176,814.16 and 71,531.60 is: 98,718.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,120.24 : 176,814.16 = 71,531.60 : x
  2. Step 2: Convert to fraction form
    128,120.24/176,814.16 = 71,531.60/x
  3. Step 3: Cross multiply
    128,120.24x = 176,814.16 × 71,531.60
  4. Step 4: Simplify right side
    128,120.24x = 12,647,799,767.46
  5. Step 5: Solve for x
    x = 12,647,799,767.46/128,120.24
  6. Step 6: Final answer
    x = 98,718.20

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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.