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Finding the Fourth Proportional to 128,966.88, 193,488.75 and 61,549.56

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Solution

The fourth proportional to 128,966.88, 193,488.75 and 61,549.56 is: 92,342.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,966.88 : 193,488.75 = 61,549.56 : x
  2. Step 2: Convert to fraction form
    128,966.88/193,488.75 = 61,549.56/x
  3. Step 3: Cross multiply
    128,966.88x = 193,488.75 × 61,549.56
  4. Step 4: Simplify right side
    128,966.88x = 11,909,147,427.45
  5. Step 5: Solve for x
    x = 11,909,147,427.45/128,966.88
  6. Step 6: Final answer
    x = 92,342.68

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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.