Home / 100,386.02-138,536.66-55,065.66

Finding the Fourth Proportional to 100,386.02, 138,536.66 and 55,065.66

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Solution

The fourth proportional to 100,386.02, 138,536.66 and 55,065.66 is: 75,992.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,386.02 : 138,536.66 = 55,065.66 : x
  2. Step 2: Convert to fraction form
    100,386.02/138,536.66 = 55,065.66/x
  3. Step 3: Cross multiply
    100,386.02x = 138,536.66 × 55,065.66
  4. Step 4: Simplify right side
    100,386.02x = 7,628,612,617.10
  5. Step 5: Solve for x
    x = 7,628,612,617.10/100,386.02
  6. Step 6: Final answer
    x = 75,992.78

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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.