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Finding the Fourth Proportional to 64,981.82, 97,476.21 and 20,612.12

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Solution

The fourth proportional to 64,981.82, 97,476.21 and 20,612.12 is: 30,919.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,981.82 : 97,476.21 = 20,612.12 : x
  2. Step 2: Convert to fraction form
    64,981.82/97,476.21 = 20,612.12/x
  3. Step 3: Cross multiply
    64,981.82x = 97,476.21 × 20,612.12
  4. Step 4: Simplify right side
    64,981.82x = 2,009,190,850.28
  5. Step 5: Solve for x
    x = 2,009,190,850.28/64,981.82
  6. Step 6: Final answer
    x = 30,919.28

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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.