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Finding the Fourth Proportional to 74,100, 111,149.83 and 57,257.51

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Solution

The fourth proportional to 74,100, 111,149.83 and 57,257.51 is: 85,886.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,100 : 111,149.83 = 57,257.51 : x
  2. Step 2: Convert to fraction form
    74,100/111,149.83 = 57,257.51/x
  3. Step 3: Cross multiply
    74,100x = 111,149.83 × 57,257.51
  4. Step 4: Simplify right side
    74,100x = 6,364,161,803.83
  5. Step 5: Solve for x
    x = 6,364,161,803.83/74,100
  6. Step 6: Final answer
    x = 85,886.12

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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.