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Finding the Fourth Proportional to 221,459.70, 332,189.55 and 81,200.10

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Solution

The fourth proportional to 221,459.70, 332,189.55 and 81,200.10 is: 121,800.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,459.70 : 332,189.55 = 81,200.10 : x
  2. Step 2: Convert to fraction form
    221,459.70/332,189.55 = 81,200.10/x
  3. Step 3: Cross multiply
    221,459.70x = 332,189.55 × 81,200.10
  4. Step 4: Simplify right side
    221,459.70x = 26,973,824,678.96
  5. Step 5: Solve for x
    x = 26,973,824,678.96/221,459.70
  6. Step 6: Final answer
    x = 121,800.15

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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.