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Finding the Fourth Proportional to 40.10, 60.10 and 37.80

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Solution

The fourth proportional to 40.10, 60.10 and 37.80 is: 56.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    40.10 : 60.10 = 37.80 : x
  2. Step 2: Convert to fraction form
    40.10/60.10 = 37.80/x
  3. Step 3: Cross multiply
    40.10x = 60.10 × 37.80
  4. Step 4: Simplify right side
    40.10x = 2,271.69
  5. Step 5: Solve for x
    x = 2,271.69/40.10
  6. Step 6: Final answer
    x = 56.66

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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.