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Finding the Fourth Proportional to 100,833.63, 139,147.95 and 55,511.25

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Solution

The fourth proportional to 100,833.63, 139,147.95 and 55,511.25 is: 76,604.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,833.63 : 139,147.95 = 55,511.25 : x
  2. Step 2: Convert to fraction form
    100,833.63/139,147.95 = 55,511.25/x
  3. Step 3: Cross multiply
    100,833.63x = 139,147.95 × 55,511.25
  4. Step 4: Simplify right side
    100,833.63x = 7,724,276,639.44
  5. Step 5: Solve for x
    x = 7,724,276,639.44/100,833.63
  6. Step 6: Final answer
    x = 76,604.17

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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.