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Finding the Fourth Proportional to 125,838.86, 188,758.34 and 103,605.54

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Solution

The fourth proportional to 125,838.86, 188,758.34 and 103,605.54 is: 155,408.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    125,838.86 : 188,758.34 = 103,605.54 : x
  2. Step 2: Convert to fraction form
    125,838.86/188,758.34 = 103,605.54/x
  3. Step 3: Cross multiply
    125,838.86x = 188,758.34 × 103,605.54
  4. Step 4: Simplify right side
    125,838.86x = 19,556,409,227.18
  5. Step 5: Solve for x
    x = 19,556,409,227.18/125,838.86
  6. Step 6: Final answer
    x = 155,408.35

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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.