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Finding the Fourth Proportional to 139,359.48, 209,065.14 and 45,871.80

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Solution

The fourth proportional to 139,359.48, 209,065.14 and 45,871.80 is: 68,816.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,359.48 : 209,065.14 = 45,871.80 : x
  2. Step 2: Convert to fraction form
    139,359.48/209,065.14 = 45,871.80/x
  3. Step 3: Cross multiply
    139,359.48x = 209,065.14 × 45,871.80
  4. Step 4: Simplify right side
    139,359.48x = 9,590,194,289.05
  5. Step 5: Solve for x
    x = 9,590,194,289.05/139,359.48
  6. Step 6: Final answer
    x = 68,816.23

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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.