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Finding the Fourth Proportional to 81,387.36, 112,301.46 and 45,578.88

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Solution

The fourth proportional to 81,387.36, 112,301.46 and 45,578.88 is: 62,891.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,387.36 : 112,301.46 = 45,578.88 : x
  2. Step 2: Convert to fraction form
    81,387.36/112,301.46 = 45,578.88/x
  3. Step 3: Cross multiply
    81,387.36x = 112,301.46 × 45,578.88
  4. Step 4: Simplify right side
    81,387.36x = 5,118,574,769.16
  5. Step 5: Solve for x
    x = 5,118,574,769.16/81,387.36
  6. Step 6: Final answer
    x = 62,891.52

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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.