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Finding the Fourth Proportional to 61,212.56, 91,810.20 and 19,654.16

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Solution

The fourth proportional to 61,212.56, 91,810.20 and 19,654.16 is: 29,478.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,212.56 : 91,810.20 = 19,654.16 : x
  2. Step 2: Convert to fraction form
    61,212.56/91,810.20 = 19,654.16/x
  3. Step 3: Cross multiply
    61,212.56x = 91,810.20 × 19,654.16
  4. Step 4: Simplify right side
    61,212.56x = 1,804,452,360.43
  5. Step 5: Solve for x
    x = 1,804,452,360.43/61,212.56
  6. Step 6: Final answer
    x = 29,478.47

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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.