Home / 131,450.60-196,916.70-78,703.40

Finding the Fourth Proportional to 131,450.60, 196,916.70 and 78,703.40

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Solution

The fourth proportional to 131,450.60, 196,916.70 and 78,703.40 is: 117,899.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,450.60 : 196,916.70 = 78,703.40 : x
  2. Step 2: Convert to fraction form
    131,450.60/196,916.70 = 78,703.40/x
  3. Step 3: Cross multiply
    131,450.60x = 196,916.70 × 78,703.40
  4. Step 4: Simplify right side
    131,450.60x = 15,498,013,806.78
  5. Step 5: Solve for x
    x = 15,498,013,806.78/131,450.60
  6. Step 6: Final answer
    x = 117,899.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.