Home / 100,404.06-138,651.38-64,656.94

Finding the Fourth Proportional to 100,404.06, 138,651.38 and 64,656.94

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Solution

The fourth proportional to 100,404.06, 138,651.38 and 64,656.94 is: 89,286.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,404.06 : 138,651.38 = 64,656.94 : x
  2. Step 2: Convert to fraction form
    100,404.06/138,651.38 = 64,656.94/x
  3. Step 3: Cross multiply
    100,404.06x = 138,651.38 × 64,656.94
  4. Step 4: Simplify right side
    100,404.06x = 8,964,773,957.58
  5. Step 5: Solve for x
    x = 8,964,773,957.58/100,404.06
  6. Step 6: Final answer
    x = 89,286.97

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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.