Home / 100,339.20-138,561.75-64,591.23

Finding the Fourth Proportional to 100,339.20, 138,561.75 and 64,591.23

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Solution

The fourth proportional to 100,339.20, 138,561.75 and 64,591.23 is: 89,196.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,339.20 : 138,561.75 = 64,591.23 : x
  2. Step 2: Convert to fraction form
    100,339.20/138,561.75 = 64,591.23/x
  3. Step 3: Cross multiply
    100,339.20x = 138,561.75 × 64,591.23
  4. Step 4: Simplify right side
    100,339.20x = 8,949,873,863.45
  5. Step 5: Solve for x
    x = 8,949,873,863.45/100,339.20
  6. Step 6: Final answer
    x = 89,196.19

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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.