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Finding the Fourth Proportional to 71.02, 106.38 and 40.50

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Solution

The fourth proportional to 71.02, 106.38 and 40.50 is: 60.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.02 : 106.38 = 40.50 : x
  2. Step 2: Convert to fraction form
    71.02/106.38 = 40.50/x
  3. Step 3: Cross multiply
    71.02x = 106.38 × 40.50
  4. Step 4: Simplify right side
    71.02x = 4,307.86
  5. Step 5: Solve for x
    x = 4,307.86/71.02
  6. Step 6: Final answer
    x = 60.66

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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.