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Finding the Fourth Proportional to 64,938.80, 97,420.32 and 20,553.56

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Solution

The fourth proportional to 64,938.80, 97,420.32 and 20,553.56 is: 30,834.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,938.80 : 97,420.32 = 20,553.56 : x
  2. Step 2: Convert to fraction form
    64,938.80/97,420.32 = 20,553.56/x
  3. Step 3: Cross multiply
    64,938.80x = 97,420.32 × 20,553.56
  4. Step 4: Simplify right side
    64,938.80x = 2,002,334,392.34
  5. Step 5: Solve for x
    x = 2,002,334,392.34/64,938.80
  6. Step 6: Final answer
    x = 30,834.18

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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.