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Finding the Fourth Proportional to 139,285.40, 192,213.30 and 75,623.20

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Solution

The fourth proportional to 139,285.40, 192,213.30 and 75,623.20 is: 104,359.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,285.40 : 192,213.30 = 75,623.20 : x
  2. Step 2: Convert to fraction form
    139,285.40/192,213.30 = 75,623.20/x
  3. Step 3: Cross multiply
    139,285.40x = 192,213.30 × 75,623.20
  4. Step 4: Simplify right side
    139,285.40x = 14,535,784,828.56
  5. Step 5: Solve for x
    x = 14,535,784,828.56/139,285.40
  6. Step 6: Final answer
    x = 104,359.72

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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.