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Finding the Fourth Proportional to 139,129.38, 191,907.77 and 88,088.92

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Solution

The fourth proportional to 139,129.38, 191,907.77 and 88,088.92 is: 121,505.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,129.38 : 191,907.77 = 88,088.92 : x
  2. Step 2: Convert to fraction form
    139,129.38/191,907.77 = 88,088.92/x
  3. Step 3: Cross multiply
    139,129.38x = 191,907.77 × 88,088.92
  4. Step 4: Simplify right side
    139,129.38x = 16,904,947,278.69
  5. Step 5: Solve for x
    x = 16,904,947,278.69/139,129.38
  6. Step 6: Final answer
    x = 121,505.23

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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.