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Finding the Fourth Proportional to 79,090.76, 109,145.09 and 43,280.76

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Solution

The fourth proportional to 79,090.76, 109,145.09 and 43,280.76 is: 59,727.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,090.76 : 109,145.09 = 43,280.76 : x
  2. Step 2: Convert to fraction form
    79,090.76/109,145.09 = 43,280.76/x
  3. Step 3: Cross multiply
    79,090.76x = 109,145.09 × 43,280.76
  4. Step 4: Simplify right side
    79,090.76x = 4,723,882,229.06
  5. Step 5: Solve for x
    x = 4,723,882,229.06/79,090.76
  6. Step 6: Final answer
    x = 59,727.36

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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.