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Finding the Fourth Proportional to 45,019.99, 67,476.05 and 20,971.88

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Solution

The fourth proportional to 45,019.99, 67,476.05 and 20,971.88 is: 31,432.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,019.99 : 67,476.05 = 20,971.88 : x
  2. Step 2: Convert to fraction form
    45,019.99/67,476.05 = 20,971.88/x
  3. Step 3: Cross multiply
    45,019.99x = 67,476.05 × 20,971.88
  4. Step 4: Simplify right side
    45,019.99x = 1,415,099,623.47
  5. Step 5: Solve for x
    x = 1,415,099,623.47/45,019.99
  6. Step 6: Final answer
    x = 31,432.70

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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.