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Finding the Fourth Proportional to 51.01, 70.35 and 39.15

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Solution

The fourth proportional to 51.01, 70.35 and 39.15 is: 53.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    51.01 : 70.35 = 39.15 : x
  2. Step 2: Convert to fraction form
    51.01/70.35 = 39.15/x
  3. Step 3: Cross multiply
    51.01x = 70.35 × 39.15
  4. Step 4: Simplify right side
    51.01x = 2,754.20
  5. Step 5: Solve for x
    x = 2,754.20/51.01
  6. Step 6: Final answer
    x = 53.99

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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.