Home / 131,237.70-196,856.55-81,155.40

Finding the Fourth Proportional to 131,237.70, 196,856.55 and 81,155.40

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Solution

The fourth proportional to 131,237.70, 196,856.55 and 81,155.40 is: 121,733.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,237.70 : 196,856.55 = 81,155.40 : x
  2. Step 2: Convert to fraction form
    131,237.70/196,856.55 = 81,155.40/x
  3. Step 3: Cross multiply
    131,237.70x = 196,856.55 × 81,155.40
  4. Step 4: Simplify right side
    131,237.70x = 15,975,972,057.87
  5. Step 5: Solve for x
    x = 15,975,972,057.87/131,237.70
  6. Step 6: Final answer
    x = 121,733.10

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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.