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Finding the Fourth Proportional to 207,859.40, 311,846.70 and 137,875.40

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Solution

The fourth proportional to 207,859.40, 311,846.70 and 137,875.40 is: 206,851.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,859.40 : 311,846.70 = 137,875.40 : x
  2. Step 2: Convert to fraction form
    207,859.40/311,846.70 = 137,875.40/x
  3. Step 3: Cross multiply
    207,859.40x = 311,846.70 × 137,875.40
  4. Step 4: Simplify right side
    207,859.40x = 42,995,988,501.18
  5. Step 5: Solve for x
    x = 42,995,988,501.18/207,859.40
  6. Step 6: Final answer
    x = 206,851.31

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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.