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Finding the Fourth Proportional to 72,388.44, 99,862.20 and 48,201.57

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Solution

The fourth proportional to 72,388.44, 99,862.20 and 48,201.57 is: 66,495.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,388.44 : 99,862.20 = 48,201.57 : x
  2. Step 2: Convert to fraction form
    72,388.44/99,862.20 = 48,201.57/x
  3. Step 3: Cross multiply
    72,388.44x = 99,862.20 × 48,201.57
  4. Step 4: Simplify right side
    72,388.44x = 4,813,514,823.65
  5. Step 5: Solve for x
    x = 4,813,514,823.65/72,388.44
  6. Step 6: Final answer
    x = 66,495.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.