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Finding the Fourth Proportional to 220,348.19, 330,551.70 and 87,197.31

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Solution

The fourth proportional to 220,348.19, 330,551.70 and 87,197.31 is: 130,807.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,348.19 : 330,551.70 = 87,197.31 : x
  2. Step 2: Convert to fraction form
    220,348.19/330,551.70 = 87,197.31/x
  3. Step 3: Cross multiply
    220,348.19x = 330,551.70 × 87,197.31
  4. Step 4: Simplify right side
    220,348.19x = 28,823,219,055.93
  5. Step 5: Solve for x
    x = 28,823,219,055.93/220,348.19
  6. Step 6: Final answer
    x = 130,807.61

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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.