Home / 80,631.48-111,325.74-72,107.16

Finding the Fourth Proportional to 80,631.48, 111,325.74 and 72,107.16

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Solution

The fourth proportional to 80,631.48, 111,325.74 and 72,107.16 is: 99,556.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,631.48 : 111,325.74 = 72,107.16 : x
  2. Step 2: Convert to fraction form
    80,631.48/111,325.74 = 72,107.16/x
  3. Step 3: Cross multiply
    80,631.48x = 111,325.74 × 72,107.16
  4. Step 4: Simplify right side
    80,631.48x = 8,027,382,946.30
  5. Step 5: Solve for x
    x = 8,027,382,946.30/80,631.48
  6. Step 6: Final answer
    x = 99,556.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.