Home / 128,434.50-177,239.61-71,845.92

Finding the Fourth Proportional to 128,434.50, 177,239.61 and 71,845.92

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Solution

The fourth proportional to 128,434.50, 177,239.61 and 71,845.92 is: 99,147.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,434.50 : 177,239.61 = 71,845.92 : x
  2. Step 2: Convert to fraction form
    128,434.50/177,239.61 = 71,845.92/x
  3. Step 3: Cross multiply
    128,434.50x = 177,239.61 × 71,845.92
  4. Step 4: Simplify right side
    128,434.50x = 12,733,942,840.89
  5. Step 5: Solve for x
    x = 12,733,942,840.89/128,434.50
  6. Step 6: Final answer
    x = 99,147.37

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.