Home / 131,486.20-196,937.70-78,998.20

Finding the Fourth Proportional to 131,486.20, 196,937.70 and 78,998.20

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Solution

The fourth proportional to 131,486.20, 196,937.70 and 78,998.20 is: 118,322.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,486.20 : 196,937.70 = 78,998.20 : x
  2. Step 2: Convert to fraction form
    131,486.20/196,937.70 = 78,998.20/x
  3. Step 3: Cross multiply
    131,486.20x = 196,937.70 × 78,998.20
  4. Step 4: Simplify right side
    131,486.20x = 15,557,723,812.14
  5. Step 5: Solve for x
    x = 15,557,723,812.14/131,486.20
  6. Step 6: Final answer
    x = 118,322.10

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1.5x scale

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.