Home / 78,461.06-117,623.54-31,683.56

Finding the Fourth Proportional to 78,461.06, 117,623.54 and 31,683.56

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Solution

The fourth proportional to 78,461.06, 117,623.54 and 31,683.56 is: 47,497.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,461.06 : 117,623.54 = 31,683.56 : x
  2. Step 2: Convert to fraction form
    78,461.06/117,623.54 = 31,683.56/x
  3. Step 3: Cross multiply
    78,461.06x = 117,623.54 × 31,683.56
  4. Step 4: Simplify right side
    78,461.06x = 3,726,731,978.09
  5. Step 5: Solve for x
    x = 3,726,731,978.09/78,461.06
  6. Step 6: Final answer
    x = 47,497.86

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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.