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Finding the Fourth Proportional to 58.68, 80.64 and 48.96

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Solution

The fourth proportional to 58.68, 80.64 and 48.96 is: 67.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.68 : 80.64 = 48.96 : x
  2. Step 2: Convert to fraction form
    58.68/80.64 = 48.96/x
  3. Step 3: Cross multiply
    58.68x = 80.64 × 48.96
  4. Step 4: Simplify right side
    58.68x = 3,948.13
  5. Step 5: Solve for x
    x = 3,948.13/58.68
  6. Step 6: Final answer
    x = 67.28

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.