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Finding the Fourth Proportional to 58.49, 87.15 and 55.87

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Solution

The fourth proportional to 58.49, 87.15 and 55.87 is: 83.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.49 : 87.15 = 55.87 : x
  2. Step 2: Convert to fraction form
    58.49/87.15 = 55.87/x
  3. Step 3: Cross multiply
    58.49x = 87.15 × 55.87
  4. Step 4: Simplify right side
    58.49x = 4,869.30
  5. Step 5: Solve for x
    x = 4,869.30/58.49
  6. Step 6: Final answer
    x = 83.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.