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Finding the Fourth Proportional to 58.93, 87.90 and 57.13

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Solution

The fourth proportional to 58.93, 87.90 and 57.13 is: 85.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.93 : 87.90 = 57.13 : x
  2. Step 2: Convert to fraction form
    58.93/87.90 = 57.13/x
  3. Step 3: Cross multiply
    58.93x = 87.90 × 57.13
  4. Step 4: Simplify right side
    58.93x = 5,021.58
  5. Step 5: Solve for x
    x = 5,021.58/58.93
  6. Step 6: Final answer
    x = 85.21

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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.