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Finding the Fourth Proportional to 98,292.72, 135,554 and 72,862.44

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Solution

The fourth proportional to 98,292.72, 135,554 and 72,862.44 is: 100,483.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,292.72 : 135,554 = 72,862.44 : x
  2. Step 2: Convert to fraction form
    98,292.72/135,554 = 72,862.44/x
  3. Step 3: Cross multiply
    98,292.72x = 135,554 × 72,862.44
  4. Step 4: Simplify right side
    98,292.72x = 9,876,795,191.76
  5. Step 5: Solve for x
    x = 9,876,795,191.76/98,292.72
  6. Step 6: Final answer
    x = 100,483.49

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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.