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Finding the Fourth Proportional to 160,061.40, 240,021.38 and 85,163.79

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Solution

The fourth proportional to 160,061.40, 240,021.38 and 85,163.79 is: 127,708.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,061.40 : 240,021.38 = 85,163.79 : x
  2. Step 2: Convert to fraction form
    160,061.40/240,021.38 = 85,163.79/x
  3. Step 3: Cross multiply
    160,061.40x = 240,021.38 × 85,163.79
  4. Step 4: Simplify right side
    160,061.40x = 20,441,129,976.01
  5. Step 5: Solve for x
    x = 20,441,129,976.01/160,061.40
  6. Step 6: Final answer
    x = 127,708.05

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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.