Home / 81,285.11-112,211.81-61,149.68

Finding the Fourth Proportional to 81,285.11, 112,211.81 and 61,149.68

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Solution

The fourth proportional to 81,285.11, 112,211.81 and 61,149.68 is: 84,415.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,285.11 : 112,211.81 = 61,149.68 : x
  2. Step 2: Convert to fraction form
    81,285.11/112,211.81 = 61,149.68/x
  3. Step 3: Cross multiply
    81,285.11x = 112,211.81 × 61,149.68
  4. Step 4: Simplify right side
    81,285.11x = 6,861,716,273.72
  5. Step 5: Solve for x
    x = 6,861,716,273.72/81,285.11
  6. Step 6: Final answer
    x = 84,415.41

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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.