Home / 100,751.11-139,033.67-55,429.18

Finding the Fourth Proportional to 100,751.11, 139,033.67 and 55,429.18

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Solution

The fourth proportional to 100,751.11, 139,033.67 and 55,429.18 is: 76,490.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,751.11 : 139,033.67 = 55,429.18 : x
  2. Step 2: Convert to fraction form
    100,751.11/139,033.67 = 55,429.18/x
  3. Step 3: Cross multiply
    100,751.11x = 139,033.67 × 55,429.18
  4. Step 4: Simplify right side
    100,751.11x = 7,706,521,695.76
  5. Step 5: Solve for x
    x = 7,706,521,695.76/100,751.11
  6. Step 6: Final answer
    x = 76,490.69

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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.