Home / 221,530,809.78-305,908,607.61-138,041,428.68

Finding the Fourth Proportional to 221,530,809.78, 305,908,607.61 and 138,041,428.68

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Solution

The fourth proportional to 221,530,809.78, 305,908,607.61 and 138,041,428.68 is: 190,619,360.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,530,809.78 : 305,908,607.61 = 138,041,428.68 : x
  2. Step 2: Convert to fraction form
    221,530,809.78/305,908,607.61 = 138,041,428.68/x
  3. Step 3: Cross multiply
    221,530,809.78x = 305,908,607.61 × 138,041,428.68
  4. Step 4: Simplify right side
    221,530,809.78x = 42,228,061,239,993,928
  5. Step 5: Solve for x
    x = 42,228,061,239,993,928/221,530,809.78
  6. Step 6: Final answer
    x = 190,619,360.27

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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.