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Finding the Fourth Proportional to 91,137.68, 125,719.45 and 53,404.64

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Solution

The fourth proportional to 91,137.68, 125,719.45 and 53,404.64 is: 73,668.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,137.68 : 125,719.45 = 53,404.64 : x
  2. Step 2: Convert to fraction form
    91,137.68/125,719.45 = 53,404.64/x
  3. Step 3: Cross multiply
    91,137.68x = 125,719.45 × 53,404.64
  4. Step 4: Simplify right side
    91,137.68x = 6,714,001,206.14
  5. Step 5: Solve for x
    x = 6,714,001,206.14/91,137.68
  6. Step 6: Final answer
    x = 73,668.78

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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.