Home / 139,869.28-209,555.15-80,582.45

Finding the Fourth Proportional to 139,869.28, 209,555.15 and 80,582.45

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Solution

The fourth proportional to 139,869.28, 209,555.15 and 80,582.45 is: 120,730.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,869.28 : 209,555.15 = 80,582.45 : x
  2. Step 2: Convert to fraction form
    139,869.28/209,555.15 = 80,582.45/x
  3. Step 3: Cross multiply
    139,869.28x = 209,555.15 × 80,582.45
  4. Step 4: Simplify right side
    139,869.28x = 16,886,466,399.71
  5. Step 5: Solve for x
    x = 16,886,466,399.71/139,869.28
  6. Step 6: Final answer
    x = 120,730.34

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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.