Home / 207,947.28-311,948.72-72,979.31

Finding the Fourth Proportional to 207,947.28, 311,948.72 and 72,979.31

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Solution

The fourth proportional to 207,947.28, 311,948.72 and 72,979.31 is: 109,478.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,947.28 : 311,948.72 = 72,979.31 : x
  2. Step 2: Convert to fraction form
    207,947.28/311,948.72 = 72,979.31/x
  3. Step 3: Cross multiply
    207,947.28x = 311,948.72 × 72,979.31
  4. Step 4: Simplify right side
    207,947.28x = 22,765,803,029.63
  5. Step 5: Solve for x
    x = 22,765,803,029.63/207,947.28
  6. Step 6: Final answer
    x = 109,478.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.