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Finding the Fourth Proportional to 239,510.94, 330,487.83 and 138,889.50

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Solution

The fourth proportional to 239,510.94, 330,487.83 and 138,889.50 is: 191,645.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,510.94 : 330,487.83 = 138,889.50 : x
  2. Step 2: Convert to fraction form
    239,510.94/330,487.83 = 138,889.50/x
  3. Step 3: Cross multiply
    239,510.94x = 330,487.83 × 138,889.50
  4. Step 4: Simplify right side
    239,510.94x = 45,901,289,464.79
  5. Step 5: Solve for x
    x = 45,901,289,464.79/239,510.94
  6. Step 6: Final answer
    x = 191,645.90

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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.