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Finding the Fourth Proportional to 102,732.80, 154,358.40 and 65,310.80

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Solution

The fourth proportional to 102,732.80, 154,358.40 and 65,310.80 is: 98,130.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,732.80 : 154,358.40 = 65,310.80 : x
  2. Step 2: Convert to fraction form
    102,732.80/154,358.40 = 65,310.80/x
  3. Step 3: Cross multiply
    102,732.80x = 154,358.40 × 65,310.80
  4. Step 4: Simplify right side
    102,732.80x = 10,081,270,590.72
  5. Step 5: Solve for x
    x = 10,081,270,590.72/102,732.80
  6. Step 6: Final answer
    x = 98,130.98

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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.