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Finding the Fourth Proportional to 98.89, 136.40 and 62.00

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Solution

The fourth proportional to 98.89, 136.40 and 62.00 is: 85.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.89 : 136.40 = 62.00 : x
  2. Step 2: Convert to fraction form
    98.89/136.40 = 62.00/x
  3. Step 3: Cross multiply
    98.89x = 136.40 × 62.00
  4. Step 4: Simplify right side
    98.89x = 8,456.67
  5. Step 5: Solve for x
    x = 8,456.67/98.89
  6. Step 6: Final answer
    x = 85.52

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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.