Home / 128,613.78-177,427.92-83,306.88

Finding the Fourth Proportional to 128,613.78, 177,427.92 and 83,306.88

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Solution

The fourth proportional to 128,613.78, 177,427.92 and 83,306.88 is: 114,925.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,613.78 : 177,427.92 = 83,306.88 : x
  2. Step 2: Convert to fraction form
    128,613.78/177,427.92 = 83,306.88/x
  3. Step 3: Cross multiply
    128,613.78x = 177,427.92 × 83,306.88
  4. Step 4: Simplify right side
    128,613.78x = 14,780,966,440.09
  5. Step 5: Solve for x
    x = 14,780,966,440.09/128,613.78
  6. Step 6: Final answer
    x = 114,925.22

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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.