Home / 84,285.60-126,379.14-31,699.20

Finding the Fourth Proportional to 84,285.60, 126,379.14 and 31,699.20

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Solution

The fourth proportional to 84,285.60, 126,379.14 and 31,699.20 is: 47,530.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,285.60 : 126,379.14 = 31,699.20 : x
  2. Step 2: Convert to fraction form
    84,285.60/126,379.14 = 31,699.20/x
  3. Step 3: Cross multiply
    84,285.60x = 126,379.14 × 31,699.20
  4. Step 4: Simplify right side
    84,285.60x = 4,006,117,634.69
  5. Step 5: Solve for x
    x = 4,006,117,634.69/84,285.60
  6. Step 6: Final answer
    x = 47,530.27

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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.