Home / 51,385.20-77,077.80-18,142.80

Finding the Fourth Proportional to 51,385.20, 77,077.80 and 18,142.80

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Solution

The fourth proportional to 51,385.20, 77,077.80 and 18,142.80 is: 27,214.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,385.20 : 77,077.80 = 18,142.80 : x
  2. Step 2: Convert to fraction form
    51,385.20/77,077.80 = 18,142.80/x
  3. Step 3: Cross multiply
    51,385.20x = 77,077.80 × 18,142.80
  4. Step 4: Simplify right side
    51,385.20x = 1,398,407,109.84
  5. Step 5: Solve for x
    x = 1,398,407,109.84/51,385.20
  6. Step 6: Final answer
    x = 27,214.20

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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.