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Finding the Fourth Proportional to 125.07, 186.78 and 104.63

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Solution

The fourth proportional to 125.07, 186.78 and 104.63 is: 156.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    125.07 : 186.78 = 104.63 : x
  2. Step 2: Convert to fraction form
    125.07/186.78 = 104.63/x
  3. Step 3: Cross multiply
    125.07x = 186.78 × 104.63
  4. Step 4: Simplify right side
    125.07x = 19,541.86
  5. Step 5: Solve for x
    x = 19,541.86/125.07
  6. Step 6: Final answer
    x = 156.25

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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.