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Finding the Fourth Proportional to 78,209.54, 107,900.88 and 51,366.60

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Solution

The fourth proportional to 78,209.54, 107,900.88 and 51,366.60 is: 70,867.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,209.54 : 107,900.88 = 51,366.60 : x
  2. Step 2: Convert to fraction form
    78,209.54/107,900.88 = 51,366.60/x
  3. Step 3: Cross multiply
    78,209.54x = 107,900.88 × 51,366.60
  4. Step 4: Simplify right side
    78,209.54x = 5,542,501,342.61
  5. Step 5: Solve for x
    x = 5,542,501,342.61/78,209.54
  6. Step 6: Final answer
    x = 70,867.33

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1.5x scale

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.