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Finding the Fourth Proportional to 160,419.91, 240,546.79 and 85,519.93

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Solution

The fourth proportional to 160,419.91, 240,546.79 and 85,519.93 is: 128,235.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    160,419.91 : 240,546.79 = 85,519.93 : x
  2. Step 2: Convert to fraction form
    160,419.91/240,546.79 = 85,519.93/x
  3. Step 3: Cross multiply
    160,419.91x = 240,546.79 × 85,519.93
  4. Step 4: Simplify right side
    160,419.91x = 20,571,544,642.52
  5. Step 5: Solve for x
    x = 20,571,544,642.52/160,419.91
  6. Step 6: Final answer
    x = 128,235.61

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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.