Home / 221,378,876.20-305,531,029.38-128,540,901.16

Finding the Fourth Proportional to 221,378,876.20, 305,531,029.38 and 128,540,901.16

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Solution

The fourth proportional to 221,378,876.20, 305,531,029.38 and 128,540,901.16 is: 177,402,806.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,378,876.20 : 305,531,029.38 = 128,540,901.16 : x
  2. Step 2: Convert to fraction form
    221,378,876.20/305,531,029.38 = 128,540,901.16/x
  3. Step 3: Cross multiply
    221,378,876.20x = 305,531,029.38 × 128,540,901.16
  4. Step 4: Simplify right side
    221,378,876.20x = 39,273,233,848,847,632
  5. Step 5: Solve for x
    x = 39,273,233,848,847,632/221,378,876.20
  6. Step 6: Final answer
    x = 177,402,806.10

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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.