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Finding the Fourth Proportional to 55.70, 83.08 and 48.54

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Solution

The fourth proportional to 55.70, 83.08 and 48.54 is: 72.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.70 : 83.08 = 48.54 : x
  2. Step 2: Convert to fraction form
    55.70/83.08 = 48.54/x
  3. Step 3: Cross multiply
    55.70x = 83.08 × 48.54
  4. Step 4: Simplify right side
    55.70x = 4,032.46
  5. Step 5: Solve for x
    x = 4,032.46/55.70
  6. Step 6: Final answer
    x = 72.40

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.