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Finding the Fourth Proportional to 501,065.28, 751,591.44 and 121,986.72

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Solution

The fourth proportional to 501,065.28, 751,591.44 and 121,986.72 is: 182,978.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,065.28 : 751,591.44 = 121,986.72 : x
  2. Step 2: Convert to fraction form
    501,065.28/751,591.44 = 121,986.72/x
  3. Step 3: Cross multiply
    501,065.28x = 751,591.44 × 121,986.72
  4. Step 4: Simplify right side
    501,065.28x = 91,684,174,545.68
  5. Step 5: Solve for x
    x = 91,684,174,545.68/501,065.28
  6. Step 6: Final answer
    x = 182,978.50

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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.