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Finding the Fourth Proportional to 64.10, 88.42 and 48.56

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Solution

The fourth proportional to 64.10, 88.42 and 48.56 is: 66.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    64.10 : 88.42 = 48.56 : x
  2. Step 2: Convert to fraction form
    64.10/88.42 = 48.56/x
  3. Step 3: Cross multiply
    64.10x = 88.42 × 48.56
  4. Step 4: Simplify right side
    64.10x = 4,293.43
  5. Step 5: Solve for x
    x = 4,293.43/64.10
  6. Step 6: Final answer
    x = 66.99

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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.