Home / 78,454.97-117,683.28-31,081.59

Finding the Fourth Proportional to 78,454.97, 117,683.28 and 31,081.59

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Solution

The fourth proportional to 78,454.97, 117,683.28 and 31,081.59 is: 46,622.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,454.97 : 117,683.28 = 31,081.59 : x
  2. Step 2: Convert to fraction form
    78,454.97/117,683.28 = 31,081.59/x
  3. Step 3: Cross multiply
    78,454.97x = 117,683.28 × 31,081.59
  4. Step 4: Simplify right side
    78,454.97x = 3,657,783,900.13
  5. Step 5: Solve for x
    x = 3,657,783,900.13/78,454.97
  6. Step 6: Final answer
    x = 46,622.72

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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.