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Finding the Fourth Proportional to 150,455.49, 207,620.87 and 86,789.49

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Solution

The fourth proportional to 150,455.49, 207,620.87 and 86,789.49 is: 119,765.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,455.49 : 207,620.87 = 86,789.49 : x
  2. Step 2: Convert to fraction form
    150,455.49/207,620.87 = 86,789.49/x
  3. Step 3: Cross multiply
    150,455.49x = 207,620.87 × 86,789.49
  4. Step 4: Simplify right side
    150,455.49x = 18,019,308,986.71
  5. Step 5: Solve for x
    x = 18,019,308,986.71/150,455.49
  6. Step 6: Final answer
    x = 119,765.05

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1.5x scale

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.