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Finding the Fourth Proportional to 202,436.87, 279,100.82 and 138,660.71

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Solution

The fourth proportional to 202,436.87, 279,100.82 and 138,660.71 is: 191,172.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,436.87 : 279,100.82 = 138,660.71 : x
  2. Step 2: Convert to fraction form
    202,436.87/279,100.82 = 138,660.71/x
  3. Step 3: Cross multiply
    202,436.87x = 279,100.82 × 138,660.71
  4. Step 4: Simplify right side
    202,436.87x = 38,700,316,813.93
  5. Step 5: Solve for x
    x = 38,700,316,813.93/202,436.87
  6. Step 6: Final answer
    x = 191,172.28

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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.