Home / 136,620.90-188,536.47-76,191.61

Finding the Fourth Proportional to 136,620.90, 188,536.47 and 76,191.61

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Solution

The fourth proportional to 136,620.90, 188,536.47 and 76,191.61 is: 105,144.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,620.90 : 188,536.47 = 76,191.61 : x
  2. Step 2: Convert to fraction form
    136,620.90/188,536.47 = 76,191.61/x
  3. Step 3: Cross multiply
    136,620.90x = 188,536.47 × 76,191.61
  4. Step 4: Simplify right side
    136,620.90x = 14,364,897,193.02
  5. Step 5: Solve for x
    x = 14,364,897,193.02/136,620.90
  6. Step 6: Final answer
    x = 105,144.21

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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.