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Finding the Fourth Proportional to 139,153.84, 192,027.12 and 75,490.28

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Solution

The fourth proportional to 139,153.84, 192,027.12 and 75,490.28 is: 104,173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,153.84 : 192,027.12 = 75,490.28 : x
  2. Step 2: Convert to fraction form
    139,153.84/192,027.12 = 75,490.28/x
  3. Step 3: Cross multiply
    139,153.84x = 192,027.12 × 75,490.28
  4. Step 4: Simplify right side
    139,153.84x = 14,496,181,056.39
  5. Step 5: Solve for x
    x = 14,496,181,056.39/139,153.84
  6. Step 6: Final answer
    x = 104,173.78

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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.