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Finding the Fourth Proportional to 59.91, 89.64 and 42.83

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Solution

The fourth proportional to 59.91, 89.64 and 42.83 is: 64.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.91 : 89.64 = 42.83 : x
  2. Step 2: Convert to fraction form
    59.91/89.64 = 42.83/x
  3. Step 3: Cross multiply
    59.91x = 89.64 × 42.83
  4. Step 4: Simplify right side
    59.91x = 3,839.28
  5. Step 5: Solve for x
    x = 3,839.28/59.91
  6. Step 6: Final answer
    x = 64.08

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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.