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Finding the Fourth Proportional to 75,345.26, 103,979.72 and 45,135.50

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Solution

The fourth proportional to 75,345.26, 103,979.72 and 45,135.50 is: 62,288.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,345.26 : 103,979.72 = 45,135.50 : x
  2. Step 2: Convert to fraction form
    75,345.26/103,979.72 = 45,135.50/x
  3. Step 3: Cross multiply
    75,345.26x = 103,979.72 × 45,135.50
  4. Step 4: Simplify right side
    75,345.26x = 4,693,176,426.38
  5. Step 5: Solve for x
    x = 4,693,176,426.38/75,345.26
  6. Step 6: Final answer
    x = 62,288.94

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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.