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Finding the Fourth Proportional to 73.40, 101.30 and 42.35

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Solution

The fourth proportional to 73.40, 101.30 and 42.35 is: 58.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    73.40 : 101.30 = 42.35 : x
  2. Step 2: Convert to fraction form
    73.40/101.30 = 42.35/x
  3. Step 3: Cross multiply
    73.40x = 101.30 × 42.35
  4. Step 4: Simplify right side
    73.40x = 4,289.34
  5. Step 5: Solve for x
    x = 4,289.34/73.40
  6. Step 6: Final answer
    x = 58.44

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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.