Home / 100,083.20-138,111.36-55,368.32

Finding the Fourth Proportional to 100,083.20, 138,111.36 and 55,368.32

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Solution

The fourth proportional to 100,083.20, 138,111.36 and 55,368.32 is: 76,406.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,083.20 : 138,111.36 = 55,368.32 : x
  2. Step 2: Convert to fraction form
    100,083.20/138,111.36 = 55,368.32/x
  3. Step 3: Cross multiply
    100,083.20x = 138,111.36 × 55,368.32
  4. Step 4: Simplify right side
    100,083.20x = 7,646,993,976.12
  5. Step 5: Solve for x
    x = 7,646,993,976.12/100,083.20
  6. Step 6: Final answer
    x = 76,406.37

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1.5x scale

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.