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Finding the Fourth Proportional to 74,858.52, 111,714.87 and 66,871.34

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Solution

The fourth proportional to 74,858.52, 111,714.87 and 66,871.34 is: 99,795.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,858.52 : 111,714.87 = 66,871.34 : x
  2. Step 2: Convert to fraction form
    74,858.52/111,714.87 = 66,871.34/x
  3. Step 3: Cross multiply
    74,858.52x = 111,714.87 × 66,871.34
  4. Step 4: Simplify right side
    74,858.52x = 7,470,523,054.83
  5. Step 5: Solve for x
    x = 7,470,523,054.83/74,858.52
  6. Step 6: Final answer
    x = 99,795.23

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.