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Finding the Fourth Proportional to 136,618.22, 188,532.77 and 76,188.93

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Solution

The fourth proportional to 136,618.22, 188,532.77 and 76,188.93 is: 105,140.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,618.22 : 188,532.77 = 76,188.93 : x
  2. Step 2: Convert to fraction form
    136,618.22/188,532.77 = 76,188.93/x
  3. Step 3: Cross multiply
    136,618.22x = 188,532.77 × 76,188.93
  4. Step 4: Simplify right side
    136,618.22x = 14,364,108,692.63
  5. Step 5: Solve for x
    x = 14,364,108,692.63/136,618.22
  6. Step 6: Final answer
    x = 105,140.51

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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.