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Finding the Fourth Proportional to 58.11, 87.59 and 57.81

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Solution

The fourth proportional to 58.11, 87.59 and 57.81 is: 87.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.11 : 87.59 = 57.81 : x
  2. Step 2: Convert to fraction form
    58.11/87.59 = 57.81/x
  3. Step 3: Cross multiply
    58.11x = 87.59 × 57.81
  4. Step 4: Simplify right side
    58.11x = 5,063.29
  5. Step 5: Solve for x
    x = 5,063.29/58.11
  6. Step 6: Final answer
    x = 87.13

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.