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Finding the Fourth Proportional to 78,347.22, 117,260.95 and 71,343.42

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Solution

The fourth proportional to 78,347.22, 117,260.95 and 71,343.42 is: 106,778.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,347.22 : 117,260.95 = 71,343.42 : x
  2. Step 2: Convert to fraction form
    78,347.22/117,260.95 = 71,343.42/x
  3. Step 3: Cross multiply
    78,347.22x = 117,260.95 × 71,343.42
  4. Step 4: Simplify right side
    78,347.22x = 8,365,797,205.45
  5. Step 5: Solve for x
    x = 8,365,797,205.45/78,347.22
  6. Step 6: Final answer
    x = 106,778.48

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1.5x scale

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.