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Finding the Fourth Proportional to 387,103.63, 580,655.23 and 120,886.96

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Solution

The fourth proportional to 387,103.63, 580,655.23 and 120,886.96 is: 181,330.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,103.63 : 580,655.23 = 120,886.96 : x
  2. Step 2: Convert to fraction form
    387,103.63/580,655.23 = 120,886.96/x
  3. Step 3: Cross multiply
    387,103.63x = 580,655.23 × 120,886.96
  4. Step 4: Simplify right side
    387,103.63x = 70,193,645,562.80
  5. Step 5: Solve for x
    x = 70,193,645,562.80/387,103.63
  6. Step 6: Final answer
    x = 181,330.37

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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.