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Finding the Fourth Proportional to 105,758.92, 145,924.50 and 61,021

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Solution

The fourth proportional to 105,758.92, 145,924.50 and 61,021 is: 84,195.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,758.92 : 145,924.50 = 61,021 : x
  2. Step 2: Convert to fraction form
    105,758.92/145,924.50 = 61,021/x
  3. Step 3: Cross multiply
    105,758.92x = 145,924.50 × 61,021
  4. Step 4: Simplify right side
    105,758.92x = 8,904,458,914.50
  5. Step 5: Solve for x
    x = 8,904,458,914.50/105,758.92
  6. Step 6: Final answer
    x = 84,195.82

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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.