Home / 78,451.50-117,729.09-36,901.74

Finding the Fourth Proportional to 78,451.50, 117,729.09 and 36,901.74

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Solution

The fourth proportional to 78,451.50, 117,729.09 and 36,901.74 is: 55,376.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,451.50 : 117,729.09 = 36,901.74 : x
  2. Step 2: Convert to fraction form
    78,451.50/117,729.09 = 36,901.74/x
  3. Step 3: Cross multiply
    78,451.50x = 117,729.09 × 36,901.74
  4. Step 4: Simplify right side
    78,451.50x = 4,344,408,269.62
  5. Step 5: Solve for x
    x = 4,344,408,269.62/78,451.50
  6. Step 6: Final answer
    x = 55,376.99

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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.