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Finding the Fourth Proportional to 56,610.80, 84,862.20 and 21,062.60

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Solution

The fourth proportional to 56,610.80, 84,862.20 and 21,062.60 is: 31,573.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,610.80 : 84,862.20 = 21,062.60 : x
  2. Step 2: Convert to fraction form
    56,610.80/84,862.20 = 21,062.60/x
  3. Step 3: Cross multiply
    56,610.80x = 84,862.20 × 21,062.60
  4. Step 4: Simplify right side
    56,610.80x = 1,787,418,573.72
  5. Step 5: Solve for x
    x = 1,787,418,573.72/56,610.80
  6. Step 6: Final answer
    x = 31,573.81

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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.