Home / 100,143.46-138,232.74-61,932.25

Finding the Fourth Proportional to 100,143.46, 138,232.74 and 61,932.25

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Solution

The fourth proportional to 100,143.46, 138,232.74 and 61,932.25 is: 85,488.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,143.46 : 138,232.74 = 61,932.25 : x
  2. Step 2: Convert to fraction form
    100,143.46/138,232.74 = 61,932.25/x
  3. Step 3: Cross multiply
    100,143.46x = 138,232.74 × 61,932.25
  4. Step 4: Simplify right side
    100,143.46x = 8,561,064,611.87
  5. Step 5: Solve for x
    x = 8,561,064,611.87/100,143.46
  6. Step 6: Final answer
    x = 85,488.01

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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.