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Finding the Fourth Proportional to 139,969,803.30, 209,954,704.95 and 79,503,627.30

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Solution

The fourth proportional to 139,969,803.30, 209,954,704.95 and 79,503,627.30 is: 119,255,440.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,969,803.30 : 209,954,704.95 = 79,503,627.30 : x
  2. Step 2: Convert to fraction form
    139,969,803.30/209,954,704.95 = 79,503,627.30/x
  3. Step 3: Cross multiply
    139,969,803.30x = 209,954,704.95 × 79,503,627.30
  4. Step 4: Simplify right side
    139,969,803.30x = 16,692,160,612,226,264
  5. Step 5: Solve for x
    x = 16,692,160,612,226,264/139,969,803.30
  6. Step 6: Final answer
    x = 119,255,440.95

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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.