Home / 78,731.76-118,116.06-31,349.73

Finding the Fourth Proportional to 78,731.76, 118,116.06 and 31,349.73

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Solution

The fourth proportional to 78,731.76, 118,116.06 and 31,349.73 is: 47,031.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,731.76 : 118,116.06 = 31,349.73 : x
  2. Step 2: Convert to fraction form
    78,731.76/118,116.06 = 31,349.73/x
  3. Step 3: Cross multiply
    78,731.76x = 118,116.06 × 31,349.73
  4. Step 4: Simplify right side
    78,731.76x = 3,702,906,589.66
  5. Step 5: Solve for x
    x = 3,702,906,589.66/78,731.76
  6. Step 6: Final answer
    x = 47,031.93

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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.