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Finding the Fourth Proportional to 98,512.89, 135,840.29 and 66,626.43

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Solution

The fourth proportional to 98,512.89, 135,840.29 and 66,626.43 is: 91,871.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,512.89 : 135,840.29 = 66,626.43 : x
  2. Step 2: Convert to fraction form
    98,512.89/135,840.29 = 66,626.43/x
  3. Step 3: Cross multiply
    98,512.89x = 135,840.29 × 66,626.43
  4. Step 4: Simplify right side
    98,512.89x = 9,050,553,869.21
  5. Step 5: Solve for x
    x = 9,050,553,869.21/98,512.89
  6. Step 6: Final answer
    x = 91,871.77

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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.