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Finding the Fourth Proportional to 149,122.32, 205,794.48 and 85,472.40

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Solution

The fourth proportional to 149,122.32, 205,794.48 and 85,472.40 is: 117,955.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,122.32 : 205,794.48 = 85,472.40 : x
  2. Step 2: Convert to fraction form
    149,122.32/205,794.48 = 85,472.40/x
  3. Step 3: Cross multiply
    149,122.32x = 205,794.48 × 85,472.40
  4. Step 4: Simplify right side
    149,122.32x = 17,589,748,112.35
  5. Step 5: Solve for x
    x = 17,589,748,112.35/149,122.32
  6. Step 6: Final answer
    x = 117,955.17

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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.