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Finding the Fourth Proportional to 199,551.60, 298,981.80 and 129,394.80

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Solution

The fourth proportional to 199,551.60, 298,981.80 and 129,394.80 is: 193,868.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,551.60 : 298,981.80 = 129,394.80 : x
  2. Step 2: Convert to fraction form
    199,551.60/298,981.80 = 129,394.80/x
  3. Step 3: Cross multiply
    199,551.60x = 298,981.80 × 129,394.80
  4. Step 4: Simplify right side
    199,551.60x = 38,686,690,214.64
  5. Step 5: Solve for x
    x = 38,686,690,214.64/199,551.60
  6. Step 6: Final answer
    x = 193,868.10

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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.