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Finding the Fourth Proportional to 174,871.80, 262,437.30 and 128,215.80

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Solution

The fourth proportional to 174,871.80, 262,437.30 and 128,215.80 is: 192,418.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    174,871.80 : 262,437.30 = 128,215.80 : x
  2. Step 2: Convert to fraction form
    174,871.80/262,437.30 = 128,215.80/x
  3. Step 3: Cross multiply
    174,871.80x = 262,437.30 × 128,215.80
  4. Step 4: Simplify right side
    174,871.80x = 33,648,608,369.34
  5. Step 5: Solve for x
    x = 33,648,608,369.34/174,871.80
  6. Step 6: Final answer
    x = 192,418.72

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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.