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Finding the Fourth Proportional to 133,813.20, 200,719.80 and 89,461.20

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Solution

The fourth proportional to 133,813.20, 200,719.80 and 89,461.20 is: 134,191.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,813.20 : 200,719.80 = 89,461.20 : x
  2. Step 2: Convert to fraction form
    133,813.20/200,719.80 = 89,461.20/x
  3. Step 3: Cross multiply
    133,813.20x = 200,719.80 × 89,461.20
  4. Step 4: Simplify right side
    133,813.20x = 17,956,634,171.76
  5. Step 5: Solve for x
    x = 17,956,634,171.76/133,813.20
  6. Step 6: Final answer
    x = 134,191.80

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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.