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Finding the Fourth Proportional to 258,343.84, 387,154.86 and 125,188.78

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Solution

The fourth proportional to 258,343.84, 387,154.86 and 125,188.78 is: 187,608.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,343.84 : 387,154.86 = 125,188.78 : x
  2. Step 2: Convert to fraction form
    258,343.84/387,154.86 = 125,188.78/x
  3. Step 3: Cross multiply
    258,343.84x = 387,154.86 × 125,188.78
  4. Step 4: Simplify right side
    258,343.84x = 48,467,444,594.47
  5. Step 5: Solve for x
    x = 48,467,444,594.47/258,343.84
  6. Step 6: Final answer
    x = 187,608.28

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1.5x scale

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.