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Finding the Fourth Proportional to 200,910.40, 301,711.20 and 142,158.40

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Solution

The fourth proportional to 200,910.40, 301,711.20 and 142,158.40 is: 213,482.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,910.40 : 301,711.20 = 142,158.40 : x
  2. Step 2: Convert to fraction form
    200,910.40/301,711.20 = 142,158.40/x
  3. Step 3: Cross multiply
    200,910.40x = 301,711.20 × 142,158.40
  4. Step 4: Simplify right side
    200,910.40x = 42,890,781,454.08
  5. Step 5: Solve for x
    x = 42,890,781,454.08/200,910.40
  6. Step 6: Final answer
    x = 213,482.14

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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.