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Finding the Fourth Proportional to 218,690.97, 301,869.01 and 128,076.06

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Solution

The fourth proportional to 218,690.97, 301,869.01 and 128,076.06 is: 176,789.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,690.97 : 301,869.01 = 128,076.06 : x
  2. Step 2: Convert to fraction form
    218,690.97/301,869.01 = 128,076.06/x
  3. Step 3: Cross multiply
    218,690.97x = 301,869.01 × 128,076.06
  4. Step 4: Simplify right side
    218,690.97x = 38,662,193,436.90
  5. Step 5: Solve for x
    x = 38,662,193,436.90/218,690.97
  6. Step 6: Final answer
    x = 176,789.16

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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.