Home / 100,028.20-138,055.90-57,611.30

Finding the Fourth Proportional to 100,028.20, 138,055.90 and 57,611.30

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Solution

The fourth proportional to 100,028.20, 138,055.90 and 57,611.30 is: 79,513.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,028.20 : 138,055.90 = 57,611.30 : x
  2. Step 2: Convert to fraction form
    100,028.20/138,055.90 = 57,611.30/x
  3. Step 3: Cross multiply
    100,028.20x = 138,055.90 × 57,611.30
  4. Step 4: Simplify right side
    100,028.20x = 7,953,579,871.67
  5. Step 5: Solve for x
    x = 7,953,579,871.67/100,028.20
  6. Step 6: Final answer
    x = 79,513.38

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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.