Home / 139,335.18-192,294.40-78,916.57

Finding the Fourth Proportional to 139,335.18, 192,294.40 and 78,916.57

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Solution

The fourth proportional to 139,335.18, 192,294.40 and 78,916.57 is: 108,911.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,335.18 : 192,294.40 = 78,916.57 : x
  2. Step 2: Convert to fraction form
    139,335.18/192,294.40 = 78,916.57/x
  3. Step 3: Cross multiply
    139,335.18x = 192,294.40 × 78,916.57
  4. Step 4: Simplify right side
    139,335.18x = 15,175,213,122.15
  5. Step 5: Solve for x
    x = 15,175,213,122.15/139,335.18
  6. Step 6: Final answer
    x = 108,911.57

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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.