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Finding the Fourth Proportional to 59.12, 89.07 and 57.90

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Solution

The fourth proportional to 59.12, 89.07 and 57.90 is: 87.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.12 : 89.07 = 57.90 : x
  2. Step 2: Convert to fraction form
    59.12/89.07 = 57.90/x
  3. Step 3: Cross multiply
    59.12x = 89.07 × 57.90
  4. Step 4: Simplify right side
    59.12x = 5,157.15
  5. Step 5: Solve for x
    x = 5,157.15/59.12
  6. Step 6: Final answer
    x = 87.24

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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.