Home / 81,847.18-112,939-51,621.09

Finding the Fourth Proportional to 81,847.18, 112,939 and 51,621.09

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Solution

The fourth proportional to 81,847.18, 112,939 and 51,621.09 is: 71,230.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,847.18 : 112,939 = 51,621.09 : x
  2. Step 2: Convert to fraction form
    81,847.18/112,939 = 51,621.09/x
  3. Step 3: Cross multiply
    81,847.18x = 112,939 × 51,621.09
  4. Step 4: Simplify right side
    81,847.18x = 5,830,034,283.51
  5. Step 5: Solve for x
    x = 5,830,034,283.51/81,847.18
  6. Step 6: Final answer
    x = 71,230.73

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1.5x scale

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.