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Finding the Fourth Proportional to 66,402.88, 99,623.77 and 21,423.33

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Solution

The fourth proportional to 66,402.88, 99,623.77 and 21,423.33 is: 32,141.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,402.88 : 99,623.77 = 21,423.33 : x
  2. Step 2: Convert to fraction form
    66,402.88/99,623.77 = 21,423.33/x
  3. Step 3: Cross multiply
    66,402.88x = 99,623.77 × 21,423.33
  4. Step 4: Simplify right side
    66,402.88x = 2,134,272,402.44
  5. Step 5: Solve for x
    x = 2,134,272,402.44/66,402.88
  6. Step 6: Final answer
    x = 32,141.26

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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.