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Finding the Fourth Proportional to 258,459.98, 387,690.31 and 125,359.84

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Solution

The fourth proportional to 258,459.98, 387,690.31 and 125,359.84 is: 188,039.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,459.98 : 387,690.31 = 125,359.84 : x
  2. Step 2: Convert to fraction form
    258,459.98/387,690.31 = 125,359.84/x
  3. Step 3: Cross multiply
    258,459.98x = 387,690.31 × 125,359.84
  4. Step 4: Simplify right side
    258,459.98x = 48,600,795,231.15
  5. Step 5: Solve for x
    x = 48,600,795,231.15/258,459.98
  6. Step 6: Final answer
    x = 188,039.92

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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.