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Finding the Fourth Proportional to 109,812.60, 164,718.90 and 64,906.20

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Solution

The fourth proportional to 109,812.60, 164,718.90 and 64,906.20 is: 97,359.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,812.60 : 164,718.90 = 64,906.20 : x
  2. Step 2: Convert to fraction form
    109,812.60/164,718.90 = 64,906.20/x
  3. Step 3: Cross multiply
    109,812.60x = 164,718.90 × 64,906.20
  4. Step 4: Simplify right side
    109,812.60x = 10,691,277,867.18
  5. Step 5: Solve for x
    x = 10,691,277,867.18/109,812.60
  6. Step 6: Final answer
    x = 97,359.30

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1.5x scale

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.