Home / 78,727.08-117,568.78-69,188.52

Finding the Fourth Proportional to 78,727.08, 117,568.78 and 69,188.52

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Solution

The fourth proportional to 78,727.08, 117,568.78 and 69,188.52 is: 103,324.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,727.08 : 117,568.78 = 69,188.52 : x
  2. Step 2: Convert to fraction form
    78,727.08/117,568.78 = 69,188.52/x
  3. Step 3: Cross multiply
    78,727.08x = 117,568.78 × 69,188.52
  4. Step 4: Simplify right side
    78,727.08x = 8,134,409,886.41
  5. Step 5: Solve for x
    x = 8,134,409,886.41/78,727.08
  6. Step 6: Final answer
    x = 103,324.17

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.