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Finding the Fourth Proportional to 136,779.40, 188,840.87 and 88,406.61

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Solution

The fourth proportional to 136,779.40, 188,840.87 and 88,406.61 is: 122,056.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,779.40 : 188,840.87 = 88,406.61 : x
  2. Step 2: Convert to fraction form
    136,779.40/188,840.87 = 88,406.61/x
  3. Step 3: Cross multiply
    136,779.40x = 188,840.87 × 88,406.61
  4. Step 4: Simplify right side
    136,779.40x = 16,694,781,146.15
  5. Step 5: Solve for x
    x = 16,694,781,146.15/136,779.40
  6. Step 6: Final answer
    x = 122,056.25

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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.