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Finding the Fourth Proportional to 67,386.80, 101,080.20 and 43,767.20

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Solution

The fourth proportional to 67,386.80, 101,080.20 and 43,767.20 is: 65,650.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,386.80 : 101,080.20 = 43,767.20 : x
  2. Step 2: Convert to fraction form
    67,386.80/101,080.20 = 43,767.20/x
  3. Step 3: Cross multiply
    67,386.80x = 101,080.20 × 43,767.20
  4. Step 4: Simplify right side
    67,386.80x = 4,423,997,329.44
  5. Step 5: Solve for x
    x = 4,423,997,329.44/67,386.80
  6. Step 6: Final answer
    x = 65,650.80

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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.