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Finding the Fourth Proportional to 125.80, 189.48 and 117.35

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Solution

The fourth proportional to 125.80, 189.48 and 117.35 is: 176.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.80 : 189.48 = 117.35 : x
  2. Step 2: Convert to fraction form
    125.80/189.48 = 117.35/x
  3. Step 3: Cross multiply
    125.80x = 189.48 × 117.35
  4. Step 4: Simplify right side
    125.80x = 22,235.48
  5. Step 5: Solve for x
    x = 22,235.48/125.80
  6. Step 6: Final answer
    x = 176.75

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.