Home / 100,363.23-138,516.43-57,351.78

Finding the Fourth Proportional to 100,363.23, 138,516.43 and 57,351.78

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Solution

The fourth proportional to 100,363.23, 138,516.43 and 57,351.78 is: 79,154.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,363.23 : 138,516.43 = 57,351.78 : x
  2. Step 2: Convert to fraction form
    100,363.23/138,516.43 = 57,351.78/x
  3. Step 3: Cross multiply
    100,363.23x = 138,516.43 × 57,351.78
  4. Step 4: Simplify right side
    100,363.23x = 7,944,163,127.16
  5. Step 5: Solve for x
    x = 7,944,163,127.16/100,363.23
  6. Step 6: Final answer
    x = 79,154.12

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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.