Home / 81,348.64-112,151.80-57,117.13

Finding the Fourth Proportional to 81,348.64, 112,151.80 and 57,117.13

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Solution

The fourth proportional to 81,348.64, 112,151.80 and 57,117.13 is: 78,744.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,348.64 : 112,151.80 = 57,117.13 : x
  2. Step 2: Convert to fraction form
    81,348.64/112,151.80 = 57,117.13/x
  3. Step 3: Cross multiply
    81,348.64x = 112,151.80 × 57,117.13
  4. Step 4: Simplify right side
    81,348.64x = 6,405,788,940.33
  5. Step 5: Solve for x
    x = 6,405,788,940.33/81,348.64
  6. Step 6: Final answer
    x = 78,744.88

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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.