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Finding the Fourth Proportional to 124,808.54, 172,235.87 and 68,219.91

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Solution

The fourth proportional to 124,808.54, 172,235.87 and 68,219.91 is: 94,143.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    124,808.54 : 172,235.87 = 68,219.91 : x
  2. Step 2: Convert to fraction form
    124,808.54/172,235.87 = 68,219.91/x
  3. Step 3: Cross multiply
    124,808.54x = 172,235.87 × 68,219.91
  4. Step 4: Simplify right side
    124,808.54x = 11,749,915,550.17
  5. Step 5: Solve for x
    x = 11,749,915,550.17/124,808.54
  6. Step 6: Final answer
    x = 94,143.52

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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.