Home / 100,442.08-138,595.52-64,680.56

Finding the Fourth Proportional to 100,442.08, 138,595.52 and 64,680.56

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Solution

The fourth proportional to 100,442.08, 138,595.52 and 64,680.56 is: 89,249.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,442.08 : 138,595.52 = 64,680.56 : x
  2. Step 2: Convert to fraction form
    100,442.08/138,595.52 = 64,680.56/x
  3. Step 3: Cross multiply
    100,442.08x = 138,595.52 × 64,680.56
  4. Step 4: Simplify right side
    100,442.08x = 8,964,435,847.09
  5. Step 5: Solve for x
    x = 8,964,435,847.09/100,442.08
  6. Step 6: Final answer
    x = 89,249.80

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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.