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Finding the Fourth Proportional to 52.13, 78.61 and 46.19

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Solution

The fourth proportional to 52.13, 78.61 and 46.19 is: 69.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    52.13 : 78.61 = 46.19 : x
  2. Step 2: Convert to fraction form
    52.13/78.61 = 46.19/x
  3. Step 3: Cross multiply
    52.13x = 78.61 × 46.19
  4. Step 4: Simplify right side
    52.13x = 3,630.76
  5. Step 5: Solve for x
    x = 3,630.76/52.13
  6. Step 6: Final answer
    x = 69.65

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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.