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Finding the Fourth Proportional to 109,670.40, 164,505.60 and 108,979.20

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Solution

The fourth proportional to 109,670.40, 164,505.60 and 108,979.20 is: 163,468.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,670.40 : 164,505.60 = 108,979.20 : x
  2. Step 2: Convert to fraction form
    109,670.40/164,505.60 = 108,979.20/x
  3. Step 3: Cross multiply
    109,670.40x = 164,505.60 × 108,979.20
  4. Step 4: Simplify right side
    109,670.40x = 17,927,688,683.52
  5. Step 5: Solve for x
    x = 17,927,688,683.52/109,670.40
  6. Step 6: Final answer
    x = 163,468.80

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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.