Home / 139,831.76-192,966.84-76,169.36

Finding the Fourth Proportional to 139,831.76, 192,966.84 and 76,169.36

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Solution

The fourth proportional to 139,831.76, 192,966.84 and 76,169.36 is: 105,113.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,831.76 : 192,966.84 = 76,169.36 : x
  2. Step 2: Convert to fraction form
    139,831.76/192,966.84 = 76,169.36/x
  3. Step 3: Cross multiply
    139,831.76x = 192,966.84 × 76,169.36
  4. Step 4: Simplify right side
    139,831.76x = 14,698,160,704.02
  5. Step 5: Solve for x
    x = 14,698,160,704.02/139,831.76
  6. Step 6: Final answer
    x = 105,113.18

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.