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Finding the Fourth Proportional to 139,127.88, 191,905.68 and 88,087.41

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Solution

The fourth proportional to 139,127.88, 191,905.68 and 88,087.41 is: 121,503.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,127.88 : 191,905.68 = 88,087.41 : x
  2. Step 2: Convert to fraction form
    139,127.88/191,905.68 = 88,087.41/x
  3. Step 3: Cross multiply
    139,127.88x = 191,905.68 × 88,087.41
  4. Step 4: Simplify right side
    139,127.88x = 16,904,474,315.49
  5. Step 5: Solve for x
    x = 16,904,474,315.49/139,127.88
  6. Step 6: Final answer
    x = 121,503.14

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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.