Home / 128,269.23-177,011.78-71,680.61

Finding the Fourth Proportional to 128,269.23, 177,011.78 and 71,680.61

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Solution

The fourth proportional to 128,269.23, 177,011.78 and 71,680.61 is: 98,919.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,269.23 : 177,011.78 = 71,680.61 : x
  2. Step 2: Convert to fraction form
    128,269.23/177,011.78 = 71,680.61/x
  3. Step 3: Cross multiply
    128,269.23x = 177,011.78 × 71,680.61
  4. Step 4: Simplify right side
    128,269.23x = 12,688,311,303.33
  5. Step 5: Solve for x
    x = 12,688,311,303.33/128,269.23
  6. Step 6: Final answer
    x = 98,919.37

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1.5x scale

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.