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Finding the Fourth Proportional to 61,242.75, 91,864.13 and 19,689.75

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Solution

The fourth proportional to 61,242.75, 91,864.13 and 19,689.75 is: 29,534.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,242.75 : 91,864.13 = 19,689.75 : x
  2. Step 2: Convert to fraction form
    61,242.75/91,864.13 = 19,689.75/x
  3. Step 3: Cross multiply
    61,242.75x = 91,864.13 × 19,689.75
  4. Step 4: Simplify right side
    61,242.75x = 1,808,781,655.22
  5. Step 5: Solve for x
    x = 1,808,781,655.22/61,242.75
  6. Step 6: Final answer
    x = 29,534.63

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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.