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Finding the Fourth Proportional to 139,235.60, 192,144.48 and 75,572.84

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Solution

The fourth proportional to 139,235.60, 192,144.48 and 75,572.84 is: 104,290.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,235.60 : 192,144.48 = 75,572.84 : x
  2. Step 2: Convert to fraction form
    139,235.60/192,144.48 = 75,572.84/x
  3. Step 3: Cross multiply
    139,235.60x = 192,144.48 × 75,572.84
  4. Step 4: Simplify right side
    139,235.60x = 14,520,904,043.92
  5. Step 5: Solve for x
    x = 14,520,904,043.92/139,235.60
  6. Step 6: Final answer
    x = 104,290.17

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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.