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Finding the Fourth Proportional to 98.77, 148.28 and 62.85

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Solution

The fourth proportional to 98.77, 148.28 and 62.85 is: 94.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    98.77 : 148.28 = 62.85 : x
  2. Step 2: Convert to fraction form
    98.77/148.28 = 62.85/x
  3. Step 3: Cross multiply
    98.77x = 148.28 × 62.85
  4. Step 4: Simplify right side
    98.77x = 9,319.08
  5. Step 5: Solve for x
    x = 9,319.08/98.77
  6. Step 6: Final answer
    x = 94.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.