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Finding the Fourth Proportional to 58.71, 87.68 and 55.61

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Solution

The fourth proportional to 58.71, 87.68 and 55.61 is: 83.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.71 : 87.68 = 55.61 : x
  2. Step 2: Convert to fraction form
    58.71/87.68 = 55.61/x
  3. Step 3: Cross multiply
    58.71x = 87.68 × 55.61
  4. Step 4: Simplify right side
    58.71x = 4,875.17
  5. Step 5: Solve for x
    x = 4,875.17/58.71
  6. Step 6: Final answer
    x = 83.04

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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.