Home / 428,815,610.34-642,909,828.87-137,516,920.62

Finding the Fourth Proportional to 428,815,610.34, 642,909,828.87 and 137,516,920.62

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Solution

The fourth proportional to 428,815,610.34, 642,909,828.87 and 137,516,920.62 is: 206,174,816.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,815,610.34 : 642,909,828.87 = 137,516,920.62 : x
  2. Step 2: Convert to fraction form
    428,815,610.34/642,909,828.87 = 137,516,920.62/x
  3. Step 3: Cross multiply
    428,815,610.34x = 642,909,828.87 × 137,516,920.62
  4. Step 4: Simplify right side
    428,815,610.34x = 88,410,979,902,533,584
  5. Step 5: Solve for x
    x = 88,410,979,902,533,584/428,815,610.34
  6. Step 6: Final answer
    x = 206,174,816.80

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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.