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Finding the Fourth Proportional to 85,367.79, 127,741.80 and 61,722.69

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Solution

The fourth proportional to 85,367.79, 127,741.80 and 61,722.69 is: 92,359.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,367.79 : 127,741.80 = 61,722.69 : x
  2. Step 2: Convert to fraction form
    85,367.79/127,741.80 = 61,722.69/x
  3. Step 3: Cross multiply
    85,367.79x = 127,741.80 × 61,722.69
  4. Step 4: Simplify right side
    85,367.79x = 7,884,567,521.44
  5. Step 5: Solve for x
    x = 7,884,567,521.44/85,367.79
  6. Step 6: Final answer
    x = 92,359.98

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.