Home / 131,921.10-197,881.65-78,698.70

Finding the Fourth Proportional to 131,921.10, 197,881.65 and 78,698.70

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Solution

The fourth proportional to 131,921.10, 197,881.65 and 78,698.70 is: 118,048.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,921.10 : 197,881.65 = 78,698.70 : x
  2. Step 2: Convert to fraction form
    131,921.10/197,881.65 = 78,698.70/x
  3. Step 3: Cross multiply
    131,921.10x = 197,881.65 × 78,698.70
  4. Step 4: Simplify right side
    131,921.10x = 15,573,028,608.86
  5. Step 5: Solve for x
    x = 15,573,028,608.86/131,921.10
  6. Step 6: Final answer
    x = 118,048.05

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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.