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Finding the Fourth Proportional to 120,092.78, 165,726.42 and 66,378.74

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Solution

The fourth proportional to 120,092.78, 165,726.42 and 66,378.74 is: 91,601.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,092.78 : 165,726.42 = 66,378.74 : x
  2. Step 2: Convert to fraction form
    120,092.78/165,726.42 = 66,378.74/x
  3. Step 3: Cross multiply
    120,092.78x = 165,726.42 × 66,378.74
  4. Step 4: Simplify right side
    120,092.78x = 11,000,710,944.31
  5. Step 5: Solve for x
    x = 11,000,710,944.31/120,092.78
  6. Step 6: Final answer
    x = 91,601.77

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1.5x scale

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.