Home / 85,790.44-128,696.96-31,747.72

Finding the Fourth Proportional to 85,790.44, 128,696.96 and 31,747.72

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Solution

The fourth proportional to 85,790.44, 128,696.96 and 31,747.72 is: 47,625.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,790.44 : 128,696.96 = 31,747.72 : x
  2. Step 2: Convert to fraction form
    85,790.44/128,696.96 = 31,747.72/x
  3. Step 3: Cross multiply
    85,790.44x = 128,696.96 × 31,747.72
  4. Step 4: Simplify right side
    85,790.44x = 4,085,835,050.93
  5. Step 5: Solve for x
    x = 4,085,835,050.93/85,790.44
  6. Step 6: Final answer
    x = 47,625.76

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.