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Finding the Fourth Proportional to 78,346.60, 117,519.90 and 74,933.80

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Solution

The fourth proportional to 78,346.60, 117,519.90 and 74,933.80 is: 112,400.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,346.60 : 117,519.90 = 74,933.80 : x
  2. Step 2: Convert to fraction form
    78,346.60/117,519.90 = 74,933.80/x
  3. Step 3: Cross multiply
    78,346.60x = 117,519.90 × 74,933.80
  4. Step 4: Simplify right side
    78,346.60x = 8,806,212,682.62
  5. Step 5: Solve for x
    x = 8,806,212,682.62/78,346.60
  6. Step 6: Final answer
    x = 112,400.70

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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.