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Finding the Fourth Proportional to 59.98, 89.97 and 21.45

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Solution

The fourth proportional to 59.98, 89.97 and 21.45 is: 32.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.98 : 89.97 = 21.45 : x
  2. Step 2: Convert to fraction form
    59.98/89.97 = 21.45/x
  3. Step 3: Cross multiply
    59.98x = 89.97 × 21.45
  4. Step 4: Simplify right side
    59.98x = 1,929.52
  5. Step 5: Solve for x
    x = 1,929.52/59.98
  6. Step 6: Final answer
    x = 32.17

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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.