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Finding the Fourth Proportional to 88,909.44, 122,726.52 and 78,411.84

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Solution

The fourth proportional to 88,909.44, 122,726.52 and 78,411.84 is: 108,236.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,909.44 : 122,726.52 = 78,411.84 : x
  2. Step 2: Convert to fraction form
    88,909.44/122,726.52 = 78,411.84/x
  3. Step 3: Cross multiply
    88,909.44x = 122,726.52 × 78,411.84
  4. Step 4: Simplify right side
    88,909.44x = 9,623,212,250.00
  5. Step 5: Solve for x
    x = 9,623,212,250.00/88,909.44
  6. Step 6: Final answer
    x = 108,236.11

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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.