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Finding the Fourth Proportional to 100,074.08, 150,111.43 and 81,264.87

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Solution

The fourth proportional to 100,074.08, 150,111.43 and 81,264.87 is: 121,897.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,074.08 : 150,111.43 = 81,264.87 : x
  2. Step 2: Convert to fraction form
    100,074.08/150,111.43 = 81,264.87/x
  3. Step 3: Cross multiply
    100,074.08x = 150,111.43 × 81,264.87
  4. Step 4: Simplify right side
    100,074.08x = 12,198,785,641.30
  5. Step 5: Solve for x
    x = 12,198,785,641.30/100,074.08
  6. Step 6: Final answer
    x = 121,897.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.