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Finding the Fourth Proportional to 58.79, 87.98 and 45.18

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Solution

The fourth proportional to 58.79, 87.98 and 45.18 is: 67.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.79 : 87.98 = 45.18 : x
  2. Step 2: Convert to fraction form
    58.79/87.98 = 45.18/x
  3. Step 3: Cross multiply
    58.79x = 87.98 × 45.18
  4. Step 4: Simplify right side
    58.79x = 3,974.71
  5. Step 5: Solve for x
    x = 3,974.71/58.79
  6. Step 6: Final answer
    x = 67.61

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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.