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Finding the Fourth Proportional to 88,355.70, 121,921.74 and 50,107.50

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Solution

The fourth proportional to 88,355.70, 121,921.74 and 50,107.50 is: 69,143.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    88,355.70 : 121,921.74 = 50,107.50 : x
  2. Step 2: Convert to fraction form
    88,355.70/121,921.74 = 50,107.50/x
  3. Step 3: Cross multiply
    88,355.70x = 121,921.74 × 50,107.50
  4. Step 4: Simplify right side
    88,355.70x = 6,109,193,587.05
  5. Step 5: Solve for x
    x = 6,109,193,587.05/88,355.70
  6. Step 6: Final answer
    x = 69,143.17

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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.