Home / 100,734.10-139,013.15-55,415.54

Finding the Fourth Proportional to 100,734.10, 139,013.15 and 55,415.54

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Solution

The fourth proportional to 100,734.10, 139,013.15 and 55,415.54 is: 76,473.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,734.10 : 139,013.15 = 55,415.54 : x
  2. Step 2: Convert to fraction form
    100,734.10/139,013.15 = 55,415.54/x
  3. Step 3: Cross multiply
    100,734.10x = 139,013.15 × 55,415.54
  4. Step 4: Simplify right side
    100,734.10x = 7,703,488,844.81
  5. Step 5: Solve for x
    x = 7,703,488,844.81/100,734.10
  6. Step 6: Final answer
    x = 76,473.50

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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.