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Finding the Fourth Proportional to 151,940.40, 209,677.56 and 84,872.40

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Solution

The fourth proportional to 151,940.40, 209,677.56 and 84,872.40 is: 117,123.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    151,940.40 : 209,677.56 = 84,872.40 : x
  2. Step 2: Convert to fraction form
    151,940.40/209,677.56 = 84,872.40/x
  3. Step 3: Cross multiply
    151,940.40x = 209,677.56 × 84,872.40
  4. Step 4: Simplify right side
    151,940.40x = 17,795,837,743.34
  5. Step 5: Solve for x
    x = 17,795,837,743.34/151,940.40
  6. Step 6: Final answer
    x = 117,123.80

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1.5x scale

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.