Home / 81,019.70-121,529.55-21,861.35

Finding the Fourth Proportional to 81,019.70, 121,529.55 and 21,861.35

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Solution

The fourth proportional to 81,019.70, 121,529.55 and 21,861.35 is: 32,792.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,019.70 : 121,529.55 = 21,861.35 : x
  2. Step 2: Convert to fraction form
    81,019.70/121,529.55 = 21,861.35/x
  3. Step 3: Cross multiply
    81,019.70x = 121,529.55 × 21,861.35
  4. Step 4: Simplify right side
    81,019.70x = 2,656,800,027.89
  5. Step 5: Solve for x
    x = 2,656,800,027.89/81,019.70
  6. Step 6: Final answer
    x = 32,792.03

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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.