Home / 100,534.29-138,737.49-55,215.20

Finding the Fourth Proportional to 100,534.29, 138,737.49 and 55,215.20

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Solution

The fourth proportional to 100,534.29, 138,737.49 and 55,215.20 is: 76,197.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,534.29 : 138,737.49 = 55,215.20 : x
  2. Step 2: Convert to fraction form
    100,534.29/138,737.49 = 55,215.20/x
  3. Step 3: Cross multiply
    100,534.29x = 138,737.49 × 55,215.20
  4. Step 4: Simplify right side
    100,534.29x = 7,660,417,564.16
  5. Step 5: Solve for x
    x = 7,660,417,564.16/100,534.29
  6. Step 6: Final answer
    x = 76,197.06

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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.