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Finding the Fourth Proportional to 66,440.43, 99,630.63 and 19,044.68

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Solution

The fourth proportional to 66,440.43, 99,630.63 and 19,044.68 is: 28,558.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,440.43 : 99,630.63 = 19,044.68 : x
  2. Step 2: Convert to fraction form
    66,440.43/99,630.63 = 19,044.68/x
  3. Step 3: Cross multiply
    66,440.43x = 99,630.63 × 19,044.68
  4. Step 4: Simplify right side
    66,440.43x = 1,897,432,968.40
  5. Step 5: Solve for x
    x = 1,897,432,968.40/66,440.43
  6. Step 6: Final answer
    x = 28,558.41

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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.