Home / 108,541.20-162,811.80-90,109.20

Finding the Fourth Proportional to 108,541.20, 162,811.80 and 90,109.20

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Solution

The fourth proportional to 108,541.20, 162,811.80 and 90,109.20 is: 135,163.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    108,541.20 : 162,811.80 = 90,109.20 : x
  2. Step 2: Convert to fraction form
    108,541.20/162,811.80 = 90,109.20/x
  3. Step 3: Cross multiply
    108,541.20x = 162,811.80 × 90,109.20
  4. Step 4: Simplify right side
    108,541.20x = 14,670,841,048.56
  5. Step 5: Solve for x
    x = 14,670,841,048.56/108,541.20
  6. Step 6: Final answer
    x = 135,163.80

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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.