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Finding the Fourth Proportional to 220,622.40, 330,868.80 and 87,458.40

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Solution

The fourth proportional to 220,622.40, 330,868.80 and 87,458.40 is: 131,161.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,622.40 : 330,868.80 = 87,458.40 : x
  2. Step 2: Convert to fraction form
    220,622.40/330,868.80 = 87,458.40/x
  3. Step 3: Cross multiply
    220,622.40x = 330,868.80 × 87,458.40
  4. Step 4: Simplify right side
    220,622.40x = 28,937,255,857.92
  5. Step 5: Solve for x
    x = 28,937,255,857.92/220,622.40
  6. Step 6: Final answer
    x = 131,161.91

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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.