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Finding the Fourth Proportional to 218,725.80, 328,134.48 and 92,366.43

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Solution

The fourth proportional to 218,725.80, 328,134.48 and 92,366.43 is: 138,568.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,725.80 : 328,134.48 = 92,366.43 : x
  2. Step 2: Convert to fraction form
    218,725.80/328,134.48 = 92,366.43/x
  3. Step 3: Cross multiply
    218,725.80x = 328,134.48 × 92,366.43
  4. Step 4: Simplify right side
    218,725.80x = 30,308,610,477.51
  5. Step 5: Solve for x
    x = 30,308,610,477.51/218,725.80
  6. Step 6: Final answer
    x = 138,568.98

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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.