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Finding the Fourth Proportional to 387,119.16, 580,761.72 and 134,407.62

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Solution

The fourth proportional to 387,119.16, 580,761.72 and 134,407.62 is: 201,640.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,119.16 : 580,761.72 = 134,407.62 : x
  2. Step 2: Convert to fraction form
    387,119.16/580,761.72 = 134,407.62/x
  3. Step 3: Cross multiply
    387,119.16x = 580,761.72 × 134,407.62
  4. Step 4: Simplify right side
    387,119.16x = 78,058,800,572.31
  5. Step 5: Solve for x
    x = 78,058,800,572.31/387,119.16
  6. Step 6: Final answer
    x = 201,640.24

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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.