Home / 78,288.75-117,529.92-74,155.32

Finding the Fourth Proportional to 78,288.75, 117,529.92 and 74,155.32

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Solution

The fourth proportional to 78,288.75, 117,529.92 and 74,155.32 is: 111,324.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,288.75 : 117,529.92 = 74,155.32 : x
  2. Step 2: Convert to fraction form
    78,288.75/117,529.92 = 74,155.32/x
  3. Step 3: Cross multiply
    78,288.75x = 117,529.92 × 74,155.32
  4. Step 4: Simplify right side
    78,288.75x = 8,715,468,827.17
  5. Step 5: Solve for x
    x = 8,715,468,827.17/78,288.75
  6. Step 6: Final answer
    x = 111,324.66

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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.