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Finding the Fourth Proportional to 101,289.62, 139,775.91 and 55,966.64

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Solution

The fourth proportional to 101,289.62, 139,775.91 and 55,966.64 is: 77,231.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,289.62 : 139,775.91 = 55,966.64 : x
  2. Step 2: Convert to fraction form
    101,289.62/139,775.91 = 55,966.64/x
  3. Step 3: Cross multiply
    101,289.62x = 139,775.91 × 55,966.64
  4. Step 4: Simplify right side
    101,289.62x = 7,822,787,336.76
  5. Step 5: Solve for x
    x = 7,822,787,336.76/101,289.62
  6. Step 6: Final answer
    x = 77,231.88

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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.