Home / 100,611.12-138,842.64-55,289.52

Finding the Fourth Proportional to 100,611.12, 138,842.64 and 55,289.52

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Solution

The fourth proportional to 100,611.12, 138,842.64 and 55,289.52 is: 76,299.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,611.12 : 138,842.64 = 55,289.52 : x
  2. Step 2: Convert to fraction form
    100,611.12/138,842.64 = 55,289.52/x
  3. Step 3: Cross multiply
    100,611.12x = 138,842.64 × 55,289.52
  4. Step 4: Simplify right side
    100,611.12x = 7,676,542,921.13
  5. Step 5: Solve for x
    x = 7,676,542,921.13/100,611.12
  6. Step 6: Final answer
    x = 76,299.15

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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.