Home / 387,107.72-580,564.14-137,731.40

Finding the Fourth Proportional to 387,107.72, 580,564.14 and 137,731.40

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Solution

The fourth proportional to 387,107.72, 580,564.14 and 137,731.40 is: 206,562.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,107.72 : 580,564.14 = 137,731.40 : x
  2. Step 2: Convert to fraction form
    387,107.72/580,564.14 = 137,731.40/x
  3. Step 3: Cross multiply
    387,107.72x = 580,564.14 × 137,731.40
  4. Step 4: Simplify right side
    387,107.72x = 79,961,911,792.00
  5. Step 5: Solve for x
    x = 79,961,911,792.00/387,107.72
  6. Step 6: Final answer
    x = 206,562.43

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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.