Home / 100,170.03-138,328.45-64,422.30

Finding the Fourth Proportional to 100,170.03, 138,328.45 and 64,422.30

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Solution

The fourth proportional to 100,170.03, 138,328.45 and 64,422.30 is: 88,963.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,170.03 : 138,328.45 = 64,422.30 : x
  2. Step 2: Convert to fraction form
    100,170.03/138,328.45 = 64,422.30/x
  3. Step 3: Cross multiply
    100,170.03x = 138,328.45 × 64,422.30
  4. Step 4: Simplify right side
    100,170.03x = 8,911,436,904.44
  5. Step 5: Solve for x
    x = 8,911,436,904.44/100,170.03
  6. Step 6: Final answer
    x = 88,963.11

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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.