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Finding the Fourth Proportional to 59.76, 89.55 and 39.51

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Solution

The fourth proportional to 59.76, 89.55 and 39.51 is: 59.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.76 : 89.55 = 39.51 : x
  2. Step 2: Convert to fraction form
    59.76/89.55 = 39.51/x
  3. Step 3: Cross multiply
    59.76x = 89.55 × 39.51
  4. Step 4: Simplify right side
    59.76x = 3,538.12
  5. Step 5: Solve for x
    x = 3,538.12/59.76
  6. Step 6: Final answer
    x = 59.21

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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.