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Finding the Fourth Proportional to 109,679.71, 151,368.22 and 66,649.27

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Solution

The fourth proportional to 109,679.71, 151,368.22 and 66,649.27 is: 91,982.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,679.71 : 151,368.22 = 66,649.27 : x
  2. Step 2: Convert to fraction form
    109,679.71/151,368.22 = 66,649.27/x
  3. Step 3: Cross multiply
    109,679.71x = 151,368.22 × 66,649.27
  4. Step 4: Simplify right side
    109,679.71x = 10,088,581,364.20
  5. Step 5: Solve for x
    x = 10,088,581,364.20/109,679.71
  6. Step 6: Final answer
    x = 91,982.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.