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Finding the Fourth Proportional to 125.18, 187.79 and 53.05

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Solution

The fourth proportional to 125.18, 187.79 and 53.05 is: 79.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.18 : 187.79 = 53.05 : x
  2. Step 2: Convert to fraction form
    125.18/187.79 = 53.05/x
  3. Step 3: Cross multiply
    125.18x = 187.79 × 53.05
  4. Step 4: Simplify right side
    125.18x = 9,962.26
  5. Step 5: Solve for x
    x = 9,962.26/125.18
  6. Step 6: Final answer
    x = 79.58

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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.