Home / 128,373.05-177,153.78-71,784.43

Finding the Fourth Proportional to 128,373.05, 177,153.78 and 71,784.43

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Solution

The fourth proportional to 128,373.05, 177,153.78 and 71,784.43 is: 99,061.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,373.05 : 177,153.78 = 71,784.43 : x
  2. Step 2: Convert to fraction form
    128,373.05/177,153.78 = 71,784.43/x
  3. Step 3: Cross multiply
    128,373.05x = 177,153.78 × 71,784.43
  4. Step 4: Simplify right side
    128,373.05x = 12,716,882,945.95
  5. Step 5: Solve for x
    x = 12,716,882,945.95/128,373.05
  6. Step 6: Final answer
    x = 99,061.93

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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.