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Finding the Fourth Proportional to 207,806.40, 311,755.84 and 96,937.92

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Solution

The fourth proportional to 207,806.40, 311,755.84 and 96,937.92 is: 145,428.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,806.40 : 311,755.84 = 96,937.92 : x
  2. Step 2: Convert to fraction form
    207,806.40/311,755.84 = 96,937.92/x
  3. Step 3: Cross multiply
    207,806.40x = 311,755.84 × 96,937.92
  4. Step 4: Simplify right side
    207,806.40x = 30,220,962,677.45
  5. Step 5: Solve for x
    x = 30,220,962,677.45/207,806.40
  6. Step 6: Final answer
    x = 145,428.45

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1.5x scale

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.