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Finding the Fourth Proportional to 77.99, 116.78 and 59.63

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Solution

The fourth proportional to 77.99, 116.78 and 59.63 is: 89.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.99 : 116.78 = 59.63 : x
  2. Step 2: Convert to fraction form
    77.99/116.78 = 59.63/x
  3. Step 3: Cross multiply
    77.99x = 116.78 × 59.63
  4. Step 4: Simplify right side
    77.99x = 6,962.71
  5. Step 5: Solve for x
    x = 6,962.71/77.99
  6. Step 6: Final answer
    x = 89.28

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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.