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Finding the Fourth Proportional to 258,344.84, 387,156.36 and 125,189.78

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Solution

The fourth proportional to 258,344.84, 387,156.36 and 125,189.78 is: 187,609.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,344.84 : 387,156.36 = 125,189.78 : x
  2. Step 2: Convert to fraction form
    258,344.84/387,156.36 = 125,189.78/x
  3. Step 3: Cross multiply
    258,344.84x = 387,156.36 × 125,189.78
  4. Step 4: Simplify right side
    258,344.84x = 48,468,019,534.00
  5. Step 5: Solve for x
    x = 48,468,019,534.00/258,344.84
  6. Step 6: Final answer
    x = 187,609.78

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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.