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Finding the Fourth Proportional to 136,887.89, 188,903.28 and 76,459.41

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Solution

The fourth proportional to 136,887.89, 188,903.28 and 76,459.41 is: 105,512.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,887.89 : 188,903.28 = 76,459.41 : x
  2. Step 2: Convert to fraction form
    136,887.89/188,903.28 = 76,459.41/x
  3. Step 3: Cross multiply
    136,887.89x = 188,903.28 × 76,459.41
  4. Step 4: Simplify right side
    136,887.89x = 14,443,433,335.86
  5. Step 5: Solve for x
    x = 14,443,433,335.86/136,887.89
  6. Step 6: Final answer
    x = 105,512.86

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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.