Home / 78,538.08-117,762.66-71,843.16

Finding the Fourth Proportional to 78,538.08, 117,762.66 and 71,843.16

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Solution

The fourth proportional to 78,538.08, 117,762.66 and 71,843.16 is: 107,724.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,538.08 : 117,762.66 = 71,843.16 : x
  2. Step 2: Convert to fraction form
    78,538.08/117,762.66 = 71,843.16/x
  3. Step 3: Cross multiply
    78,538.08x = 117,762.66 × 71,843.16
  4. Step 4: Simplify right side
    78,538.08x = 8,460,441,624.41
  5. Step 5: Solve for x
    x = 8,460,441,624.41/78,538.08
  6. Step 6: Final answer
    x = 107,724.07

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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.