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Finding the Fourth Proportional to 368,768.80, 553,328.70 and 132,135.40

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Solution

The fourth proportional to 368,768.80, 553,328.70 and 132,135.40 is: 198,265.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,768.80 : 553,328.70 = 132,135.40 : x
  2. Step 2: Convert to fraction form
    368,768.80/553,328.70 = 132,135.40/x
  3. Step 3: Cross multiply
    368,768.80x = 553,328.70 × 132,135.40
  4. Step 4: Simplify right side
    368,768.80x = 73,114,309,105.98
  5. Step 5: Solve for x
    x = 73,114,309,105.98/368,768.80
  6. Step 6: Final answer
    x = 198,265.98

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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.