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Finding the Fourth Proportional to 64,978.90, 97,480.50 and 20,593.73

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Solution

The fourth proportional to 64,978.90, 97,480.50 and 20,593.73 is: 30,894.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,978.90 : 97,480.50 = 20,593.73 : x
  2. Step 2: Convert to fraction form
    64,978.90/97,480.50 = 20,593.73/x
  3. Step 3: Cross multiply
    64,978.90x = 97,480.50 × 20,593.73
  4. Step 4: Simplify right side
    64,978.90x = 2,007,486,994.30
  5. Step 5: Solve for x
    x = 2,007,486,994.30/64,978.90
  6. Step 6: Final answer
    x = 30,894.45

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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.