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Finding the Fourth Proportional to 61,112.16, 91,609.92 and 19,530.72

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Solution

The fourth proportional to 61,112.16, 91,609.92 and 19,530.72 is: 29,277.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,112.16 : 91,609.92 = 19,530.72 : x
  2. Step 2: Convert to fraction form
    61,112.16/91,609.92 = 19,530.72/x
  3. Step 3: Cross multiply
    61,112.16x = 91,609.92 × 19,530.72
  4. Step 4: Simplify right side
    61,112.16x = 1,789,207,696.74
  5. Step 5: Solve for x
    x = 1,789,207,696.74/61,112.16
  6. Step 6: Final answer
    x = 29,277.44

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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.