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Finding the Fourth Proportional to 253,429.92, 380,110.32 and 66,425.76

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Solution

The fourth proportional to 253,429.92, 380,110.32 and 66,425.76 is: 99,629.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,429.92 : 380,110.32 = 66,425.76 : x
  2. Step 2: Convert to fraction form
    253,429.92/380,110.32 = 66,425.76/x
  3. Step 3: Cross multiply
    253,429.92x = 380,110.32 × 66,425.76
  4. Step 4: Simplify right side
    253,429.92x = 25,249,116,889.84
  5. Step 5: Solve for x
    x = 25,249,116,889.84/253,429.92
  6. Step 6: Final answer
    x = 99,629.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.