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Finding the Fourth Proportional to 64,920.98, 97,396.07 and 20,550.40

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Solution

The fourth proportional to 64,920.98, 97,396.07 and 20,550.40 is: 30,830.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,920.98 : 97,396.07 = 20,550.40 : x
  2. Step 2: Convert to fraction form
    64,920.98/97,396.07 = 20,550.40/x
  3. Step 3: Cross multiply
    64,920.98x = 97,396.07 × 20,550.40
  4. Step 4: Simplify right side
    64,920.98x = 2,001,527,850.69
  5. Step 5: Solve for x
    x = 2,001,527,850.69/64,920.98
  6. Step 6: Final answer
    x = 30,830.22

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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.