Home / 100,629.17-138,870.80-55,308.30

Finding the Fourth Proportional to 100,629.17, 138,870.80 and 55,308.30

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Solution

The fourth proportional to 100,629.17, 138,870.80 and 55,308.30 is: 76,326.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,629.17 : 138,870.80 = 55,308.30 : x
  2. Step 2: Convert to fraction form
    100,629.17/138,870.80 = 55,308.30/x
  3. Step 3: Cross multiply
    100,629.17x = 138,870.80 × 55,308.30
  4. Step 4: Simplify right side
    100,629.17x = 7,680,707,867.64
  5. Step 5: Solve for x
    x = 7,680,707,867.64/100,629.17
  6. Step 6: Final answer
    x = 76,326.85

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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.