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Finding the Fourth Proportional to 71,777.16, 99,057.06 and 43,489.80

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Solution

The fourth proportional to 71,777.16, 99,057.06 and 43,489.80 is: 60,018.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,777.16 : 99,057.06 = 43,489.80 : x
  2. Step 2: Convert to fraction form
    71,777.16/99,057.06 = 43,489.80/x
  3. Step 3: Cross multiply
    71,777.16x = 99,057.06 × 43,489.80
  4. Step 4: Simplify right side
    71,777.16x = 4,307,971,727.99
  5. Step 5: Solve for x
    x = 4,307,971,727.99/71,777.16
  6. Step 6: Final answer
    x = 60,018.70

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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.