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Finding the Fourth Proportional to 56.65, 78.16 and 35.95

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Solution

The fourth proportional to 56.65, 78.16 and 35.95 is: 49.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    56.65 : 78.16 = 35.95 : x
  2. Step 2: Convert to fraction form
    56.65/78.16 = 35.95/x
  3. Step 3: Cross multiply
    56.65x = 78.16 × 35.95
  4. Step 4: Simplify right side
    56.65x = 2,809.66
  5. Step 5: Solve for x
    x = 2,809.66/56.65
  6. Step 6: Final answer
    x = 49.60

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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.