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Finding the Fourth Proportional to 54,990.65, 75,794.58 and 42,065.48

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Solution

The fourth proportional to 54,990.65, 75,794.58 and 42,065.48 is: 57,979.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,990.65 : 75,794.58 = 42,065.48 : x
  2. Step 2: Convert to fraction form
    54,990.65/75,794.58 = 42,065.48/x
  3. Step 3: Cross multiply
    54,990.65x = 75,794.58 × 42,065.48
  4. Step 4: Simplify right side
    54,990.65x = 3,188,335,010.13
  5. Step 5: Solve for x
    x = 3,188,335,010.13/54,990.65
  6. Step 6: Final answer
    x = 57,979.59

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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.