Home / 78,650.91-117,859.70-57,772.35

Finding the Fourth Proportional to 78,650.91, 117,859.70 and 57,772.35

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Solution

The fourth proportional to 78,650.91, 117,859.70 and 57,772.35 is: 86,572.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,650.91 : 117,859.70 = 57,772.35 : x
  2. Step 2: Convert to fraction form
    78,650.91/117,859.70 = 57,772.35/x
  3. Step 3: Cross multiply
    78,650.91x = 117,859.70 × 57,772.35
  4. Step 4: Simplify right side
    78,650.91x = 6,809,031,983.73
  5. Step 5: Solve for x
    x = 6,809,031,983.73/78,650.91
  6. Step 6: Final answer
    x = 86,572.83

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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.