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Finding the Fourth Proportional to 139,339.26, 192,289.59 and 75,678.30

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Solution

The fourth proportional to 139,339.26, 192,289.59 and 75,678.30 is: 104,436.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,339.26 : 192,289.59 = 75,678.30 : x
  2. Step 2: Convert to fraction form
    139,339.26/192,289.59 = 75,678.30/x
  3. Step 3: Cross multiply
    139,339.26x = 192,289.59 × 75,678.30
  4. Step 4: Simplify right side
    139,339.26x = 14,552,149,278.90
  5. Step 5: Solve for x
    x = 14,552,149,278.90/139,339.26
  6. Step 6: Final answer
    x = 104,436.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.