Home / 208,631.79-287,912.03-113,138.46

Finding the Fourth Proportional to 208,631.79, 287,912.03 and 113,138.46

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Solution

The fourth proportional to 208,631.79, 287,912.03 and 113,138.46 is: 156,131.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,631.79 : 287,912.03 = 113,138.46 : x
  2. Step 2: Convert to fraction form
    208,631.79/287,912.03 = 113,138.46/x
  3. Step 3: Cross multiply
    208,631.79x = 287,912.03 × 113,138.46
  4. Step 4: Simplify right side
    208,631.79x = 32,573,923,123.98
  5. Step 5: Solve for x
    x = 32,573,923,123.98/208,631.79
  6. Step 6: Final answer
    x = 156,131.16

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.