Home / 128,524.20-177,363.90-71,935.50

Finding the Fourth Proportional to 128,524.20, 177,363.90 and 71,935.50

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Solution

The fourth proportional to 128,524.20, 177,363.90 and 71,935.50 is: 99,271.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,524.20 : 177,363.90 = 71,935.50 : x
  2. Step 2: Convert to fraction form
    128,524.20/177,363.90 = 71,935.50/x
  3. Step 3: Cross multiply
    128,524.20x = 177,363.90 × 71,935.50
  4. Step 4: Simplify right side
    128,524.20x = 12,758,760,828.45
  5. Step 5: Solve for x
    x = 12,758,760,828.45/128,524.20
  6. Step 6: Final answer
    x = 99,271.27

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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.