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Finding the Fourth Proportional to 55.72, 82.95 and 53.10

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Solution

The fourth proportional to 55.72, 82.95 and 53.10 is: 79.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    55.72 : 82.95 = 53.10 : x
  2. Step 2: Convert to fraction form
    55.72/82.95 = 53.10/x
  3. Step 3: Cross multiply
    55.72x = 82.95 × 53.10
  4. Step 4: Simplify right side
    55.72x = 4,404.65
  5. Step 5: Solve for x
    x = 4,404.65/55.72
  6. Step 6: Final answer
    x = 79.05

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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.