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Finding the Fourth Proportional to 66,188.99, 99,227.66 and 28,720.89

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Solution

The fourth proportional to 66,188.99, 99,227.66 and 28,720.89 is: 43,057.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,188.99 : 99,227.66 = 28,720.89 : x
  2. Step 2: Convert to fraction form
    66,188.99/99,227.66 = 28,720.89/x
  3. Step 3: Cross multiply
    66,188.99x = 99,227.66 × 28,720.89
  4. Step 4: Simplify right side
    66,188.99x = 2,849,906,707.82
  5. Step 5: Solve for x
    x = 2,849,906,707.82/66,188.99
  6. Step 6: Final answer
    x = 43,057.11

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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.