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Finding the Fourth Proportional to 258,137.54, 387,192.39 and 80,624.18

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Solution

The fourth proportional to 258,137.54, 387,192.39 and 80,624.18 is: 120,931.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,137.54 : 387,192.39 = 80,624.18 : x
  2. Step 2: Convert to fraction form
    258,137.54/387,192.39 = 80,624.18/x
  3. Step 3: Cross multiply
    258,137.54x = 387,192.39 × 80,624.18
  4. Step 4: Simplify right side
    258,137.54x = 31,217,068,945.99
  5. Step 5: Solve for x
    x = 31,217,068,945.99/258,137.54
  6. Step 6: Final answer
    x = 120,931.92

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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.