Home / 128,865.80-177,844.52-71,515.94

Finding the Fourth Proportional to 128,865.80, 177,844.52 and 71,515.94

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Solution

The fourth proportional to 128,865.80, 177,844.52 and 71,515.94 is: 98,697.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,865.80 : 177,844.52 = 71,515.94 : x
  2. Step 2: Convert to fraction form
    128,865.80/177,844.52 = 71,515.94/x
  3. Step 3: Cross multiply
    128,865.80x = 177,844.52 × 71,515.94
  4. Step 4: Simplify right side
    128,865.80x = 12,718,716,774.85
  5. Step 5: Solve for x
    x = 12,718,716,774.85/128,865.80
  6. Step 6: Final answer
    x = 98,697.38

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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.