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Finding the Fourth Proportional to 61,170.56, 91,747.20 and 19,612.16

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Solution

The fourth proportional to 61,170.56, 91,747.20 and 19,612.16 is: 29,415.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,170.56 : 91,747.20 = 19,612.16 : x
  2. Step 2: Convert to fraction form
    61,170.56/91,747.20 = 19,612.16/x
  3. Step 3: Cross multiply
    61,170.56x = 91,747.20 × 19,612.16
  4. Step 4: Simplify right side
    61,170.56x = 1,799,360,765.95
  5. Step 5: Solve for x
    x = 1,799,360,765.95/61,170.56
  6. Step 6: Final answer
    x = 29,415.47

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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.