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Finding the Fourth Proportional to 81,410.66, 112,290.61 and 57,262.84

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Solution

The fourth proportional to 81,410.66, 112,290.61 and 57,262.84 is: 78,983.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,410.66 : 112,290.61 = 57,262.84 : x
  2. Step 2: Convert to fraction form
    81,410.66/112,290.61 = 57,262.84/x
  3. Step 3: Cross multiply
    81,410.66x = 112,290.61 × 57,262.84
  4. Step 4: Simplify right side
    81,410.66x = 6,430,079,233.93
  5. Step 5: Solve for x
    x = 6,430,079,233.93/81,410.66
  6. Step 6: Final answer
    x = 78,983.26

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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.