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Finding the Fourth Proportional to 110,787.90, 153,087.22 and 78,901.44

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Solution

The fourth proportional to 110,787.90, 153,087.22 and 78,901.44 is: 109,026.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    110,787.90 : 153,087.22 = 78,901.44 : x
  2. Step 2: Convert to fraction form
    110,787.90/153,087.22 = 78,901.44/x
  3. Step 3: Cross multiply
    110,787.90x = 153,087.22 × 78,901.44
  4. Step 4: Simplify right side
    110,787.90x = 12,078,802,103.60
  5. Step 5: Solve for x
    x = 12,078,802,103.60/110,787.90
  6. Step 6: Final answer
    x = 109,026.37

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1.5x scale

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.