Home / 78,263.12-117,390.36-57,224.72

Finding the Fourth Proportional to 78,263.12, 117,390.36 and 57,224.72

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Solution

The fourth proportional to 78,263.12, 117,390.36 and 57,224.72 is: 85,833.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,263.12 : 117,390.36 = 57,224.72 : x
  2. Step 2: Convert to fraction form
    78,263.12/117,390.36 = 57,224.72/x
  3. Step 3: Cross multiply
    78,263.12x = 117,390.36 × 57,224.72
  4. Step 4: Simplify right side
    78,263.12x = 6,717,630,481.70
  5. Step 5: Solve for x
    x = 6,717,630,481.70/78,263.12
  6. Step 6: Final answer
    x = 85,833.92

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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.