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Finding the Fourth Proportional to 107.61, 148.51 and 58.49

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Solution

The fourth proportional to 107.61, 148.51 and 58.49 is: 80.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    107.61 : 148.51 = 58.49 : x
  2. Step 2: Convert to fraction form
    107.61/148.51 = 58.49/x
  3. Step 3: Cross multiply
    107.61x = 148.51 × 58.49
  4. Step 4: Simplify right side
    107.61x = 8,686.62
  5. Step 5: Solve for x
    x = 8,686.62/107.61
  6. Step 6: Final answer
    x = 80.72

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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.