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Finding the Fourth Proportional to 139,898.28, 209,888.44 and 45,126.56

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Solution

The fourth proportional to 139,898.28, 209,888.44 and 45,126.56 is: 67,703.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,898.28 : 209,888.44 = 45,126.56 : x
  2. Step 2: Convert to fraction form
    139,898.28/209,888.44 = 45,126.56/x
  3. Step 3: Cross multiply
    139,898.28x = 209,888.44 × 45,126.56
  4. Step 4: Simplify right side
    139,898.28x = 9,471,543,280.97
  5. Step 5: Solve for x
    x = 9,471,543,280.97/139,898.28
  6. Step 6: Final answer
    x = 67,703.07

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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.