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Finding the Fourth Proportional to 61,334.28, 91,998.18 and 19,781.28

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Solution

The fourth proportional to 61,334.28, 91,998.18 and 19,781.28 is: 29,670.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,334.28 : 91,998.18 = 19,781.28 : x
  2. Step 2: Convert to fraction form
    61,334.28/91,998.18 = 19,781.28/x
  3. Step 3: Cross multiply
    61,334.28x = 91,998.18 × 19,781.28
  4. Step 4: Simplify right side
    61,334.28x = 1,819,841,758.07
  5. Step 5: Solve for x
    x = 1,819,841,758.07/61,334.28
  6. Step 6: Final answer
    x = 29,670.88

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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.