Home / 100,339.22-138,561.86-64,591.36

Finding the Fourth Proportional to 100,339.22, 138,561.86 and 64,591.36

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Solution

The fourth proportional to 100,339.22, 138,561.86 and 64,591.36 is: 89,196.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,339.22 : 138,561.86 = 64,591.36 : x
  2. Step 2: Convert to fraction form
    100,339.22/138,561.86 = 64,591.36/x
  3. Step 3: Cross multiply
    100,339.22x = 138,561.86 × 64,591.36
  4. Step 4: Simplify right side
    100,339.22x = 8,949,898,981.53
  5. Step 5: Solve for x
    x = 8,949,898,981.53/100,339.22
  6. Step 6: Final answer
    x = 89,196.42

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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.