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Finding the Fourth Proportional to 55.61, 83.51 and 48.05

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Solution

The fourth proportional to 55.61, 83.51 and 48.05 is: 72.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.61 : 83.51 = 48.05 : x
  2. Step 2: Convert to fraction form
    55.61/83.51 = 48.05/x
  3. Step 3: Cross multiply
    55.61x = 83.51 × 48.05
  4. Step 4: Simplify right side
    55.61x = 4,012.42
  5. Step 5: Solve for x
    x = 4,012.42/55.61
  6. Step 6: Final answer
    x = 72.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.