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Finding the Fourth Proportional to 365,078.80, 547,699.80 and 128,429.20

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Solution

The fourth proportional to 365,078.80, 547,699.80 and 128,429.20 is: 192,672.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    365,078.80 : 547,699.80 = 128,429.20 : x
  2. Step 2: Convert to fraction form
    365,078.80/547,699.80 = 128,429.20/x
  3. Step 3: Cross multiply
    365,078.80x = 547,699.80 × 128,429.20
  4. Step 4: Simplify right side
    365,078.80x = 70,340,647,154.16
  5. Step 5: Solve for x
    x = 70,340,647,154.16/365,078.80
  6. Step 6: Final answer
    x = 192,672.51

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1.5x scale

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.