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Finding the Fourth Proportional to 61,815.41, 85,268.71 and 39,459.41

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Solution

The fourth proportional to 61,815.41, 85,268.71 and 39,459.41 is: 54,430.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,815.41 : 85,268.71 = 39,459.41 : x
  2. Step 2: Convert to fraction form
    61,815.41/85,268.71 = 39,459.41/x
  3. Step 3: Cross multiply
    61,815.41x = 85,268.71 × 39,459.41
  4. Step 4: Simplify right side
    61,815.41x = 3,364,652,930.80
  5. Step 5: Solve for x
    x = 3,364,652,930.80/61,815.41
  6. Step 6: Final answer
    x = 54,430.65

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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.