Home / 100,753.17-139,039.38-55,430.18

Finding the Fourth Proportional to 100,753.17, 139,039.38 and 55,430.18

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Solution

The fourth proportional to 100,753.17, 139,039.38 and 55,430.18 is: 76,493.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,753.17 : 139,039.38 = 55,430.18 : x
  2. Step 2: Convert to fraction form
    100,753.17/139,039.38 = 55,430.18/x
  3. Step 3: Cross multiply
    100,753.17x = 139,039.38 × 55,430.18
  4. Step 4: Simplify right side
    100,753.17x = 7,706,978,208.09
  5. Step 5: Solve for x
    x = 7,706,978,208.09/100,753.17
  6. Step 6: Final answer
    x = 76,493.65

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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.