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Finding the Fourth Proportional to 139,901.94, 209,882.90 and 45,137.52

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Solution

The fourth proportional to 139,901.94, 209,882.90 and 45,137.52 is: 67,715.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,901.94 : 209,882.90 = 45,137.52 : x
  2. Step 2: Convert to fraction form
    139,901.94/209,882.90 = 45,137.52/x
  3. Step 3: Cross multiply
    139,901.94x = 209,882.90 × 45,137.52
  4. Step 4: Simplify right side
    139,901.94x = 9,473,593,370.72
  5. Step 5: Solve for x
    x = 9,473,593,370.72/139,901.94
  6. Step 6: Final answer
    x = 67,715.95

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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.