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Finding the Fourth Proportional to 66,514.59, 91,715.72 and 54,377.19

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Solution

The fourth proportional to 66,514.59, 91,715.72 and 54,377.19 is: 74,979.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,514.59 : 91,715.72 = 54,377.19 : x
  2. Step 2: Convert to fraction form
    66,514.59/91,715.72 = 54,377.19/x
  3. Step 3: Cross multiply
    66,514.59x = 91,715.72 × 54,377.19
  4. Step 4: Simplify right side
    66,514.59x = 4,987,242,860.54
  5. Step 5: Solve for x
    x = 4,987,242,860.54/66,514.59
  6. Step 6: Final answer
    x = 74,979.68

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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.