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Finding the Fourth Proportional to 220,710.40, 330,944.64 and 87,455.68

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Solution

The fourth proportional to 220,710.40, 330,944.64 and 87,455.68 is: 131,135.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,710.40 : 330,944.64 = 87,455.68 : x
  2. Step 2: Convert to fraction form
    220,710.40/330,944.64 = 87,455.68/x
  3. Step 3: Cross multiply
    220,710.40x = 330,944.64 × 87,455.68
  4. Step 4: Simplify right side
    220,710.40x = 28,942,988,533.56
  5. Step 5: Solve for x
    x = 28,942,988,533.56/220,710.40
  6. Step 6: Final answer
    x = 131,135.59

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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.