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Finding the Fourth Proportional to 73.19, 101.04 and 56.78

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Solution

The fourth proportional to 73.19, 101.04 and 56.78 is: 78.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.19 : 101.04 = 56.78 : x
  2. Step 2: Convert to fraction form
    73.19/101.04 = 56.78/x
  3. Step 3: Cross multiply
    73.19x = 101.04 × 56.78
  4. Step 4: Simplify right side
    73.19x = 5,737.05
  5. Step 5: Solve for x
    x = 5,737.05/73.19
  6. Step 6: Final answer
    x = 78.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.