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Finding the Fourth Proportional to 58.62, 80.72 and 48.71

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Solution

The fourth proportional to 58.62, 80.72 and 48.71 is: 67.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.62 : 80.72 = 48.71 : x
  2. Step 2: Convert to fraction form
    58.62/80.72 = 48.71/x
  3. Step 3: Cross multiply
    58.62x = 80.72 × 48.71
  4. Step 4: Simplify right side
    58.62x = 3,931.87
  5. Step 5: Solve for x
    x = 3,931.87/58.62
  6. Step 6: Final answer
    x = 67.07

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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.