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Finding the Fourth Proportional to 53,479, 80,155.86 and 18,387.64

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Solution

The fourth proportional to 53,479, 80,155.86 and 18,387.64 is: 27,559.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    53,479 : 80,155.86 = 18,387.64 : x
  2. Step 2: Convert to fraction form
    53,479/80,155.86 = 18,387.64/x
  3. Step 3: Cross multiply
    53,479x = 80,155.86 × 18,387.64
  4. Step 4: Simplify right side
    53,479x = 1,473,877,097.57
  5. Step 5: Solve for x
    x = 1,473,877,097.57/53,479
  6. Step 6: Final answer
    x = 27,559.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.