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Finding the Fourth Proportional to 258,416.66, 387,624.99 and 80,937.56

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Solution

The fourth proportional to 258,416.66, 387,624.99 and 80,937.56 is: 121,406.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,416.66 : 387,624.99 = 80,937.56 : x
  2. Step 2: Convert to fraction form
    258,416.66/387,624.99 = 80,937.56/x
  3. Step 3: Cross multiply
    258,416.66x = 387,624.99 × 80,937.56
  4. Step 4: Simplify right side
    258,416.66x = 31,373,420,885.62
  5. Step 5: Solve for x
    x = 31,373,420,885.62/258,416.66
  6. Step 6: Final answer
    x = 121,406.34

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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.