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Finding the Fourth Proportional to 77.48, 116.18 and 47.01

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Solution

The fourth proportional to 77.48, 116.18 and 47.01 is: 70.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    77.48 : 116.18 = 47.01 : x
  2. Step 2: Convert to fraction form
    77.48/116.18 = 47.01/x
  3. Step 3: Cross multiply
    77.48x = 116.18 × 47.01
  4. Step 4: Simplify right side
    77.48x = 5,461.39
  5. Step 5: Solve for x
    x = 5,461.39/77.48
  6. Step 6: Final answer
    x = 70.49

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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.