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Finding the Fourth Proportional to 61,318.76, 91,987.74 and 19,769.96

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Solution

The fourth proportional to 61,318.76, 91,987.74 and 19,769.96 is: 29,658.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,318.76 : 91,987.74 = 19,769.96 : x
  2. Step 2: Convert to fraction form
    61,318.76/91,987.74 = 19,769.96/x
  3. Step 3: Cross multiply
    61,318.76x = 91,987.74 × 19,769.96
  4. Step 4: Simplify right side
    61,318.76x = 1,818,593,940.29
  5. Step 5: Solve for x
    x = 1,818,593,940.29/61,318.76
  6. Step 6: Final answer
    x = 29,658.04

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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.