Home / 78,217.54-107,911.92-51,374.60

Finding the Fourth Proportional to 78,217.54, 107,911.92 and 51,374.60

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Solution

The fourth proportional to 78,217.54, 107,911.92 and 51,374.60 is: 70,878.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,217.54 : 107,911.92 = 51,374.60 : x
  2. Step 2: Convert to fraction form
    78,217.54/107,911.92 = 51,374.60/x
  3. Step 3: Cross multiply
    78,217.54x = 107,911.92 × 51,374.60
  4. Step 4: Simplify right side
    78,217.54x = 5,543,931,725.23
  5. Step 5: Solve for x
    x = 5,543,931,725.23/78,217.54
  6. Step 6: Final answer
    x = 70,878.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.