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Finding the Fourth Proportional to 139,248.64, 192,165.12 and 75,586.56

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Solution

The fourth proportional to 139,248.64, 192,165.12 and 75,586.56 is: 104,310.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,248.64 : 192,165.12 = 75,586.56 : x
  2. Step 2: Convert to fraction form
    139,248.64/192,165.12 = 75,586.56/x
  3. Step 3: Cross multiply
    139,248.64x = 192,165.12 × 75,586.56
  4. Step 4: Simplify right side
    139,248.64x = 14,525,100,372.79
  5. Step 5: Solve for x
    x = 14,525,100,372.79/139,248.64
  6. Step 6: Final answer
    x = 104,310.54

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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.