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Finding the Fourth Proportional to 135,460.80, 202,802.40 and 82,972.80

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Solution

The fourth proportional to 135,460.80, 202,802.40 and 82,972.80 is: 124,221.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,460.80 : 202,802.40 = 82,972.80 : x
  2. Step 2: Convert to fraction form
    135,460.80/202,802.40 = 82,972.80/x
  3. Step 3: Cross multiply
    135,460.80x = 202,802.40 × 82,972.80
  4. Step 4: Simplify right side
    135,460.80x = 16,827,082,974.72
  5. Step 5: Solve for x
    x = 16,827,082,974.72/135,460.80
  6. Step 6: Final answer
    x = 124,221.05

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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.