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Finding the Fourth Proportional to 61,301.30, 91,918.58 and 19,163.20

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Solution

The fourth proportional to 61,301.30, 91,918.58 and 19,163.20 is: 28,734.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,301.30 : 91,918.58 = 19,163.20 : x
  2. Step 2: Convert to fraction form
    61,301.30/91,918.58 = 19,163.20/x
  3. Step 3: Cross multiply
    61,301.30x = 91,918.58 × 19,163.20
  4. Step 4: Simplify right side
    61,301.30x = 1,761,454,132.26
  5. Step 5: Solve for x
    x = 1,761,454,132.26/61,301.30
  6. Step 6: Final answer
    x = 28,734.37

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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.