Home / 131,623.60-197,176.20-78,876.40

Finding the Fourth Proportional to 131,623.60, 197,176.20 and 78,876.40

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Solution

The fourth proportional to 131,623.60, 197,176.20 and 78,876.40 is: 118,159.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,623.60 : 197,176.20 = 78,876.40 : x
  2. Step 2: Convert to fraction form
    131,623.60/197,176.20 = 78,876.40/x
  3. Step 3: Cross multiply
    131,623.60x = 197,176.20 × 78,876.40
  4. Step 4: Simplify right side
    131,623.60x = 15,552,548,821.68
  5. Step 5: Solve for x
    x = 15,552,548,821.68/131,623.60
  6. Step 6: Final answer
    x = 118,159.27

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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.