Home / 100,845.12-139,166.28-55,523.28

Finding the Fourth Proportional to 100,845.12, 139,166.28 and 55,523.28

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Solution

The fourth proportional to 100,845.12, 139,166.28 and 55,523.28 is: 76,622.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,845.12 : 139,166.28 = 55,523.28 : x
  2. Step 2: Convert to fraction form
    100,845.12/139,166.28 = 55,523.28/x
  3. Step 3: Cross multiply
    100,845.12x = 139,166.28 × 55,523.28
  4. Step 4: Simplify right side
    100,845.12x = 7,726,968,331.00
  5. Step 5: Solve for x
    x = 7,726,968,331.00/100,845.12
  6. Step 6: Final answer
    x = 76,622.13

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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.