Home / 387,108.72-580,565.64-137,732.40

Finding the Fourth Proportional to 387,108.72, 580,565.64 and 137,732.40

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Solution

The fourth proportional to 387,108.72, 580,565.64 and 137,732.40 is: 206,563.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,108.72 : 580,565.64 = 137,732.40 : x
  2. Step 2: Convert to fraction form
    387,108.72/580,565.64 = 137,732.40/x
  3. Step 3: Cross multiply
    387,108.72x = 580,565.64 × 137,732.40
  4. Step 4: Simplify right side
    387,108.72x = 79,962,698,954.74
  5. Step 5: Solve for x
    x = 79,962,698,954.74/387,108.72
  6. Step 6: Final answer
    x = 206,563.93

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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.