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Finding the Fourth Proportional to 208,932.59, 313,421.16 and 66,728.18

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Solution

The fourth proportional to 208,932.59, 313,421.16 and 66,728.18 is: 100,099.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,932.59 : 313,421.16 = 66,728.18 : x
  2. Step 2: Convert to fraction form
    208,932.59/313,421.16 = 66,728.18/x
  3. Step 3: Cross multiply
    208,932.59x = 313,421.16 × 66,728.18
  4. Step 4: Simplify right side
    208,932.59x = 20,914,023,580.29
  5. Step 5: Solve for x
    x = 20,914,023,580.29/208,932.59
  6. Step 6: Final answer
    x = 100,099.38

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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.