Home / 153,890.21-212,374.91-85,910.96

Finding the Fourth Proportional to 153,890.21, 212,374.91 and 85,910.96

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Solution

The fourth proportional to 153,890.21, 212,374.91 and 85,910.96 is: 118,560.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    153,890.21 : 212,374.91 = 85,910.96 : x
  2. Step 2: Convert to fraction form
    153,890.21/212,374.91 = 85,910.96/x
  3. Step 3: Cross multiply
    153,890.21x = 212,374.91 × 85,910.96
  4. Step 4: Simplify right side
    153,890.21x = 18,245,332,398.01
  5. Step 5: Solve for x
    x = 18,245,332,398.01/153,890.21
  6. Step 6: Final answer
    x = 118,560.71

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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.