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Finding the Fourth Proportional to 81,094.50, 121,661.19 and 25,690.50

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Solution

The fourth proportional to 81,094.50, 121,661.19 and 25,690.50 is: 38,541.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,094.50 : 121,661.19 = 25,690.50 : x
  2. Step 2: Convert to fraction form
    81,094.50/121,661.19 = 25,690.50/x
  3. Step 3: Cross multiply
    81,094.50x = 121,661.19 × 25,690.50
  4. Step 4: Simplify right side
    81,094.50x = 3,125,536,801.70
  5. Step 5: Solve for x
    x = 3,125,536,801.70/81,094.50
  6. Step 6: Final answer
    x = 38,541.91

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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.