Home / 100,690.02-138,949.29-55,367.96

Finding the Fourth Proportional to 100,690.02, 138,949.29 and 55,367.96

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Solution

The fourth proportional to 100,690.02, 138,949.29 and 55,367.96 is: 76,406.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,690.02 : 138,949.29 = 55,367.96 : x
  2. Step 2: Convert to fraction form
    100,690.02/138,949.29 = 55,367.96/x
  3. Step 3: Cross multiply
    100,690.02x = 138,949.29 × 55,367.96
  4. Step 4: Simplify right side
    100,690.02x = 7,693,338,036.00
  5. Step 5: Solve for x
    x = 7,693,338,036.00/100,690.02
  6. Step 6: Final answer
    x = 76,406.16

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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.