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Finding the Fourth Proportional to 62.15, 93.38 and 57.90

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Solution

The fourth proportional to 62.15, 93.38 and 57.90 is: 87.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    62.15 : 93.38 = 57.90 : x
  2. Step 2: Convert to fraction form
    62.15/93.38 = 57.90/x
  3. Step 3: Cross multiply
    62.15x = 93.38 × 57.90
  4. Step 4: Simplify right side
    62.15x = 5,406.41
  5. Step 5: Solve for x
    x = 5,406.41/62.15
  6. Step 6: Final answer
    x = 87.00

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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.