Home / 100,787.72-139,072.38-60,492.92

Finding the Fourth Proportional to 100,787.72, 139,072.38 and 60,492.92

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Solution

The fourth proportional to 100,787.72, 139,072.38 and 60,492.92 is: 83,471.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,787.72 : 139,072.38 = 60,492.92 : x
  2. Step 2: Convert to fraction form
    100,787.72/139,072.38 = 60,492.92/x
  3. Step 3: Cross multiply
    100,787.72x = 139,072.38 × 60,492.92
  4. Step 4: Simplify right side
    100,787.72x = 8,412,894,357.55
  5. Step 5: Solve for x
    x = 8,412,894,357.55/100,787.72
  6. Step 6: Final answer
    x = 83,471.42

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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.