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Finding the Fourth Proportional to 61,899.39, 85,473.50 and 39,278.52

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Solution

The fourth proportional to 61,899.39, 85,473.50 and 39,278.52 is: 54,237.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,899.39 : 85,473.50 = 39,278.52 : x
  2. Step 2: Convert to fraction form
    61,899.39/85,473.50 = 39,278.52/x
  3. Step 3: Cross multiply
    61,899.39x = 85,473.50 × 39,278.52
  4. Step 4: Simplify right side
    61,899.39x = 3,357,272,382.83
  5. Step 5: Solve for x
    x = 3,357,272,382.83/61,899.39
  6. Step 6: Final answer
    x = 54,237.57

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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.