Home / 78,339.24-117,508.86-45,109.80

Finding the Fourth Proportional to 78,339.24, 117,508.86 and 45,109.80

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Solution

The fourth proportional to 78,339.24, 117,508.86 and 45,109.80 is: 67,664.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,339.24 : 117,508.86 = 45,109.80 : x
  2. Step 2: Convert to fraction form
    78,339.24/117,508.86 = 45,109.80/x
  3. Step 3: Cross multiply
    78,339.24x = 117,508.86 × 45,109.80
  4. Step 4: Simplify right side
    78,339.24x = 5,300,801,172.83
  5. Step 5: Solve for x
    x = 5,300,801,172.83/78,339.24
  6. Step 6: Final answer
    x = 67,664.70

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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.