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Finding the Fourth Proportional to 133,428.60, 200,142.90 and 118,265.40

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Solution

The fourth proportional to 133,428.60, 200,142.90 and 118,265.40 is: 177,398.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    133,428.60 : 200,142.90 = 118,265.40 : x
  2. Step 2: Convert to fraction form
    133,428.60/200,142.90 = 118,265.40/x
  3. Step 3: Cross multiply
    133,428.60x = 200,142.90 × 118,265.40
  4. Step 4: Simplify right side
    133,428.60x = 23,669,980,125.66
  5. Step 5: Solve for x
    x = 23,669,980,125.66/133,428.60
  6. Step 6: Final answer
    x = 177,398.10

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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.