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Finding the Fourth Proportional to 139,479.76, 192,482.20 and 75,817.56

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Solution

The fourth proportional to 139,479.76, 192,482.20 and 75,817.56 is: 104,628.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,479.76 : 192,482.20 = 75,817.56 : x
  2. Step 2: Convert to fraction form
    139,479.76/192,482.20 = 75,817.56/x
  3. Step 3: Cross multiply
    139,479.76x = 192,482.20 × 75,817.56
  4. Step 4: Simplify right side
    139,479.76x = 14,593,530,054.83
  5. Step 5: Solve for x
    x = 14,593,530,054.83/139,479.76
  6. Step 6: Final answer
    x = 104,628.30

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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.