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Finding the Fourth Proportional to 71,418.61, 98,558.22 and 39,587.48

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Solution

The fourth proportional to 71,418.61, 98,558.22 and 39,587.48 is: 54,631.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,418.61 : 98,558.22 = 39,587.48 : x
  2. Step 2: Convert to fraction form
    71,418.61/98,558.22 = 39,587.48/x
  3. Step 3: Cross multiply
    71,418.61x = 98,558.22 × 39,587.48
  4. Step 4: Simplify right side
    71,418.61x = 3,901,671,920.05
  5. Step 5: Solve for x
    x = 3,901,671,920.05/71,418.61
  6. Step 6: Final answer
    x = 54,631.02

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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.