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Finding the Fourth Proportional to 220,612.94, 330,628.61 and 87,420.54

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Solution

The fourth proportional to 220,612.94, 330,628.61 and 87,420.54 is: 131,015.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,612.94 : 330,628.61 = 87,420.54 : x
  2. Step 2: Convert to fraction form
    220,612.94/330,628.61 = 87,420.54/x
  3. Step 3: Cross multiply
    220,612.94x = 330,628.61 × 87,420.54
  4. Step 4: Simplify right side
    220,612.94x = 28,903,731,908.29
  5. Step 5: Solve for x
    x = 28,903,731,908.29/220,612.94
  6. Step 6: Final answer
    x = 131,015.58

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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.