Home / 428,754,731.14-643,162,836.36-179,509,171.87

Finding the Fourth Proportional to 428,754,731.14, 643,162,836.36 and 179,509,171.87

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Solution

The fourth proportional to 428,754,731.14, 643,162,836.36 and 179,509,171.87 is: 269,276,627.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,754,731.14 : 643,162,836.36 = 179,509,171.87 : x
  2. Step 2: Convert to fraction form
    428,754,731.14/643,162,836.36 = 179,509,171.87/x
  3. Step 3: Cross multiply
    428,754,731.14x = 643,162,836.36 × 179,509,171.87
  4. Step 4: Simplify right side
    428,754,731.14x = 115,453,628,128,887,824
  5. Step 5: Solve for x
    x = 115,453,628,128,887,824/428,754,731.14
  6. Step 6: Final answer
    x = 269,276,627.74

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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.