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Finding the Fourth Proportional to 47.02, 70.50 and 43.42

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Solution

The fourth proportional to 47.02, 70.50 and 43.42 is: 65.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    47.02 : 70.50 = 43.42 : x
  2. Step 2: Convert to fraction form
    47.02/70.50 = 43.42/x
  3. Step 3: Cross multiply
    47.02x = 70.50 × 43.42
  4. Step 4: Simplify right side
    47.02x = 3,061.11
  5. Step 5: Solve for x
    x = 3,061.11/47.02
  6. Step 6: Final answer
    x = 65.10

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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.