Home / 207,689.28-311,555.79-102,407.10

Finding the Fourth Proportional to 207,689.28, 311,555.79 and 102,407.10

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Solution

The fourth proportional to 207,689.28, 311,555.79 and 102,407.10 is: 153,621.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,689.28 : 311,555.79 = 102,407.10 : x
  2. Step 2: Convert to fraction form
    207,689.28/311,555.79 = 102,407.10/x
  3. Step 3: Cross multiply
    207,689.28x = 311,555.79 × 102,407.10
  4. Step 4: Simplify right side
    207,689.28x = 31,905,524,942.11
  5. Step 5: Solve for x
    x = 31,905,524,942.11/207,689.28
  6. Step 6: Final answer
    x = 153,621.43

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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.