Home / 139,986.46-209,831.15-68,808.72

Finding the Fourth Proportional to 139,986.46, 209,831.15 and 68,808.72

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Solution

The fourth proportional to 139,986.46, 209,831.15 and 68,808.72 is: 103,140.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,986.46 : 209,831.15 = 68,808.72 : x
  2. Step 2: Convert to fraction form
    139,986.46/209,831.15 = 68,808.72/x
  3. Step 3: Cross multiply
    139,986.46x = 209,831.15 × 68,808.72
  4. Step 4: Simplify right side
    139,986.46x = 14,438,212,847.63
  5. Step 5: Solve for x
    x = 14,438,212,847.63/139,986.46
  6. Step 6: Final answer
    x = 103,140.07

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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.