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Finding the Fourth Proportional to 139,057.76, 191,761.44 and 104,684.80

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Solution

The fourth proportional to 139,057.76, 191,761.44 and 104,684.80 is: 144,360.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,057.76 : 191,761.44 = 104,684.80 : x
  2. Step 2: Convert to fraction form
    139,057.76/191,761.44 = 104,684.80/x
  3. Step 3: Cross multiply
    139,057.76x = 191,761.44 × 104,684.80
  4. Step 4: Simplify right side
    139,057.76x = 20,074,507,994.11
  5. Step 5: Solve for x
    x = 20,074,507,994.11/139,057.76
  6. Step 6: Final answer
    x = 144,360.93

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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.