Home / 100,247.58-138,026.07-85,110.30

Finding the Fourth Proportional to 100,247.58, 138,026.07 and 85,110.30

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Solution

The fourth proportional to 100,247.58, 138,026.07 and 85,110.30 is: 117,184.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,247.58 : 138,026.07 = 85,110.30 : x
  2. Step 2: Convert to fraction form
    100,247.58/138,026.07 = 85,110.30/x
  3. Step 3: Cross multiply
    100,247.58x = 138,026.07 × 85,110.30
  4. Step 4: Simplify right side
    100,247.58x = 11,747,440,225.52
  5. Step 5: Solve for x
    x = 11,747,440,225.52/100,247.58
  6. Step 6: Final answer
    x = 117,184.28

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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.