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Finding the Fourth Proportional to 74,915.80, 112,422.30 and 43,325.80

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Solution

The fourth proportional to 74,915.80, 112,422.30 and 43,325.80 is: 65,016.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,915.80 : 112,422.30 = 43,325.80 : x
  2. Step 2: Convert to fraction form
    74,915.80/112,422.30 = 43,325.80/x
  3. Step 3: Cross multiply
    74,915.80x = 112,422.30 × 43,325.80
  4. Step 4: Simplify right side
    74,915.80x = 4,870,786,085.34
  5. Step 5: Solve for x
    x = 4,870,786,085.34/74,915.80
  6. Step 6: Final answer
    x = 65,016.81

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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.