Home / 100,880.04-139,167.66-65,081.56

Finding the Fourth Proportional to 100,880.04, 139,167.66 and 65,081.56

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Solution

The fourth proportional to 100,880.04, 139,167.66 and 65,081.56 is: 89,782.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,880.04 : 139,167.66 = 65,081.56 : x
  2. Step 2: Convert to fraction form
    100,880.04/139,167.66 = 65,081.56/x
  3. Step 3: Cross multiply
    100,880.04x = 139,167.66 × 65,081.56
  4. Step 4: Simplify right side
    100,880.04x = 9,057,248,414.35
  5. Step 5: Solve for x
    x = 9,057,248,414.35/100,880.04
  6. Step 6: Final answer
    x = 89,782.36

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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.