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Finding the Fourth Proportional to 118,932.60, 164,134.58 and 78,575.56

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Solution

The fourth proportional to 118,932.60, 164,134.58 and 78,575.56 is: 108,439.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,932.60 : 164,134.58 = 78,575.56 : x
  2. Step 2: Convert to fraction form
    118,932.60/164,134.58 = 78,575.56/x
  3. Step 3: Cross multiply
    118,932.60x = 164,134.58 × 78,575.56
  4. Step 4: Simplify right side
    118,932.60x = 12,896,966,538.86
  5. Step 5: Solve for x
    x = 12,896,966,538.86/118,932.60
  6. Step 6: Final answer
    x = 108,439.29

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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.