Home / 100,831.24-139,150.68-57,817.40

Finding the Fourth Proportional to 100,831.24, 139,150.68 and 57,817.40

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Solution

The fourth proportional to 100,831.24, 139,150.68 and 57,817.40 is: 79,790.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,831.24 : 139,150.68 = 57,817.40 : x
  2. Step 2: Convert to fraction form
    100,831.24/139,150.68 = 57,817.40/x
  3. Step 3: Cross multiply
    100,831.24x = 139,150.68 × 57,817.40
  4. Step 4: Simplify right side
    100,831.24x = 8,045,330,525.83
  5. Step 5: Solve for x
    x = 8,045,330,525.83/100,831.24
  6. Step 6: Final answer
    x = 79,790.06

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1.5x scale

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.