Home / 128,031.23-191,938.41-53,104.61

Finding the Fourth Proportional to 128,031.23, 191,938.41 and 53,104.61

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Solution

The fourth proportional to 128,031.23, 191,938.41 and 53,104.61 is: 79,611.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,031.23 : 191,938.41 = 53,104.61 : x
  2. Step 2: Convert to fraction form
    128,031.23/191,938.41 = 53,104.61/x
  3. Step 3: Cross multiply
    128,031.23x = 191,938.41 × 53,104.61
  4. Step 4: Simplify right side
    128,031.23x = 10,192,814,621.39
  5. Step 5: Solve for x
    x = 10,192,814,621.39/128,031.23
  6. Step 6: Final answer
    x = 79,611.94

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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.