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Finding the Fourth Proportional to 54,693.90, 75,479.04 and 30,819.15

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Solution

The fourth proportional to 54,693.90, 75,479.04 and 30,819.15 is: 42,531.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,693.90 : 75,479.04 = 30,819.15 : x
  2. Step 2: Convert to fraction form
    54,693.90/75,479.04 = 30,819.15/x
  3. Step 3: Cross multiply
    54,693.90x = 75,479.04 × 30,819.15
  4. Step 4: Simplify right side
    54,693.90x = 2,326,199,855.62
  5. Step 5: Solve for x
    x = 2,326,199,855.62/54,693.90
  6. Step 6: Final answer
    x = 42,531.25

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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.