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Finding the Fourth Proportional to 71.69, 99.03 and 51.05

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Solution

The fourth proportional to 71.69, 99.03 and 51.05 is: 70.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    71.69 : 99.03 = 51.05 : x
  2. Step 2: Convert to fraction form
    71.69/99.03 = 51.05/x
  3. Step 3: Cross multiply
    71.69x = 99.03 × 51.05
  4. Step 4: Simplify right side
    71.69x = 5,055.48
  5. Step 5: Solve for x
    x = 5,055.48/71.69
  6. Step 6: Final answer
    x = 70.52

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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.