Home / 100,612.12-138,844.02-55,290.52

Finding the Fourth Proportional to 100,612.12, 138,844.02 and 55,290.52

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Solution

The fourth proportional to 100,612.12, 138,844.02 and 55,290.52 is: 76,300.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,612.12 : 138,844.02 = 55,290.52 : x
  2. Step 2: Convert to fraction form
    100,612.12/138,844.02 = 55,290.52/x
  3. Step 3: Cross multiply
    100,612.12x = 138,844.02 × 55,290.52
  4. Step 4: Simplify right side
    100,612.12x = 7,676,758,064.69
  5. Step 5: Solve for x
    x = 7,676,758,064.69/100,612.12
  6. Step 6: Final answer
    x = 76,300.53

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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.