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Finding the Fourth Proportional to 220,142.70, 330,121.71 and 70,342.92

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Solution

The fourth proportional to 220,142.70, 330,121.71 and 70,342.92 is: 105,484.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,142.70 : 330,121.71 = 70,342.92 : x
  2. Step 2: Convert to fraction form
    220,142.70/330,121.71 = 70,342.92/x
  3. Step 3: Cross multiply
    220,142.70x = 330,121.71 × 70,342.92
  4. Step 4: Simplify right side
    220,142.70x = 23,221,725,036.79
  5. Step 5: Solve for x
    x = 23,221,725,036.79/220,142.70
  6. Step 6: Final answer
    x = 105,484.87

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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.