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Finding the Fourth Proportional to 77,915.40, 116,890.44 and 36,339.72

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Solution

The fourth proportional to 77,915.40, 116,890.44 and 36,339.72 is: 54,517.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,915.40 : 116,890.44 = 36,339.72 : x
  2. Step 2: Convert to fraction form
    77,915.40/116,890.44 = 36,339.72/x
  3. Step 3: Cross multiply
    77,915.40x = 116,890.44 × 36,339.72
  4. Step 4: Simplify right side
    77,915.40x = 4,247,765,860.28
  5. Step 5: Solve for x
    x = 4,247,765,860.28/77,915.40
  6. Step 6: Final answer
    x = 54,517.67

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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.