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Finding the Fourth Proportional to 81,927, 122,776.20 and 61,920.06

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Solution

The fourth proportional to 81,927, 122,776.20 and 61,920.06 is: 92,793.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,927 : 122,776.20 = 61,920.06 : x
  2. Step 2: Convert to fraction form
    81,927/122,776.20 = 61,920.06/x
  3. Step 3: Cross multiply
    81,927x = 122,776.20 × 61,920.06
  4. Step 4: Simplify right side
    81,927x = 7,602,309,670.57
  5. Step 5: Solve for x
    x = 7,602,309,670.57/81,927
  6. Step 6: Final answer
    x = 92,793.70

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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.