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Finding the Fourth Proportional to 58.10, 87.12 and 25.61

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Solution

The fourth proportional to 58.10, 87.12 and 25.61 is: 38.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.10 : 87.12 = 25.61 : x
  2. Step 2: Convert to fraction form
    58.10/87.12 = 25.61/x
  3. Step 3: Cross multiply
    58.10x = 87.12 × 25.61
  4. Step 4: Simplify right side
    58.10x = 2,230.71
  5. Step 5: Solve for x
    x = 2,230.71/58.10
  6. Step 6: Final answer
    x = 38.40

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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.