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Finding the Fourth Proportional to 51.88, 78.10 and 40.52

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Solution

The fourth proportional to 51.88, 78.10 and 40.52 is: 61.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.88 : 78.10 = 40.52 : x
  2. Step 2: Convert to fraction form
    51.88/78.10 = 40.52/x
  3. Step 3: Cross multiply
    51.88x = 78.10 × 40.52
  4. Step 4: Simplify right side
    51.88x = 3,164.61
  5. Step 5: Solve for x
    x = 3,164.61/51.88
  6. Step 6: Final answer
    x = 61.00

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.