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Finding the Fourth Proportional to 61,886.76, 85,405.64 and 36,388.52

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Solution

The fourth proportional to 61,886.76, 85,405.64 and 36,388.52 is: 50,217.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,886.76 : 85,405.64 = 36,388.52 : x
  2. Step 2: Convert to fraction form
    61,886.76/85,405.64 = 36,388.52/x
  3. Step 3: Cross multiply
    61,886.76x = 85,405.64 × 36,388.52
  4. Step 4: Simplify right side
    61,886.76x = 3,107,784,839.25
  5. Step 5: Solve for x
    x = 3,107,784,839.25/61,886.76
  6. Step 6: Final answer
    x = 50,217.28

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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.