Home / 387,078.30-580,617.50-120,861.62

Finding the Fourth Proportional to 387,078.30, 580,617.50 and 120,861.62

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Solution

The fourth proportional to 387,078.30, 580,617.50 and 120,861.62 is: 181,292.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,078.30 : 580,617.50 = 120,861.62 : x
  2. Step 2: Convert to fraction form
    387,078.30/580,617.50 = 120,861.62/x
  3. Step 3: Cross multiply
    387,078.30x = 580,617.50 × 120,861.62
  4. Step 4: Simplify right side
    387,078.30x = 70,174,371,650.35
  5. Step 5: Solve for x
    x = 70,174,371,650.35/387,078.30
  6. Step 6: Final answer
    x = 181,292.45

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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.