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Finding the Fourth Proportional to 60,636.96, 90,914.31 and 21,172.50

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Solution

The fourth proportional to 60,636.96, 90,914.31 and 21,172.50 is: 31,744.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,636.96 : 90,914.31 = 21,172.50 : x
  2. Step 2: Convert to fraction form
    60,636.96/90,914.31 = 21,172.50/x
  3. Step 3: Cross multiply
    60,636.96x = 90,914.31 × 21,172.50
  4. Step 4: Simplify right side
    60,636.96x = 1,924,883,228.48
  5. Step 5: Solve for x
    x = 1,924,883,228.48/60,636.96
  6. Step 6: Final answer
    x = 31,744.39

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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.