Home / 221,530,517.28-305,705,679.12-122,409,689.76

Finding the Fourth Proportional to 221,530,517.28, 305,705,679.12 and 122,409,689.76

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Solution

The fourth proportional to 221,530,517.28, 305,705,679.12 and 122,409,689.76 is: 168,921,816.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,530,517.28 : 305,705,679.12 = 122,409,689.76 : x
  2. Step 2: Convert to fraction form
    221,530,517.28/305,705,679.12 = 122,409,689.76/x
  3. Step 3: Cross multiply
    221,530,517.28x = 305,705,679.12 × 122,409,689.76
  4. Step 4: Simplify right side
    221,530,517.28x = 37,421,337,338,949,312
  5. Step 5: Solve for x
    x = 37,421,337,338,949,312/221,530,517.28
  6. Step 6: Final answer
    x = 168,921,816.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.