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Finding the Fourth Proportional to 258,480.81, 387,783.18 and 125,205.30

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Solution

The fourth proportional to 258,480.81, 387,783.18 and 125,205.30 is: 187,837.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,480.81 : 387,783.18 = 125,205.30 : x
  2. Step 2: Convert to fraction form
    258,480.81/387,783.18 = 125,205.30/x
  3. Step 3: Cross multiply
    258,480.81x = 387,783.18 × 125,205.30
  4. Step 4: Simplify right side
    258,480.81x = 48,552,509,386.85
  5. Step 5: Solve for x
    x = 48,552,509,386.85/258,480.81
  6. Step 6: Final answer
    x = 187,837.97

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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.