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Finding the Fourth Proportional to 136,822.08, 188,812.69 and 76,393.76

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Solution

The fourth proportional to 136,822.08, 188,812.69 and 76,393.76 is: 105,422.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,822.08 : 188,812.69 = 76,393.76 : x
  2. Step 2: Convert to fraction form
    136,822.08/188,812.69 = 76,393.76/x
  3. Step 3: Cross multiply
    136,822.08x = 188,812.69 × 76,393.76
  4. Step 4: Simplify right side
    136,822.08x = 14,424,110,189.77
  5. Step 5: Solve for x
    x = 14,424,110,189.77/136,822.08
  6. Step 6: Final answer
    x = 105,422.38

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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.