Home / 128,529.52-177,345.53-80,755.19

Finding the Fourth Proportional to 128,529.52, 177,345.53 and 80,755.19

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Solution

The fourth proportional to 128,529.52, 177,345.53 and 80,755.19 is: 111,426.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,529.52 : 177,345.53 = 80,755.19 : x
  2. Step 2: Convert to fraction form
    128,529.52/177,345.53 = 80,755.19/x
  3. Step 3: Cross multiply
    128,529.52x = 177,345.53 × 80,755.19
  4. Step 4: Simplify right side
    128,529.52x = 14,321,571,970.80
  5. Step 5: Solve for x
    x = 14,321,571,970.80/128,529.52
  6. Step 6: Final answer
    x = 111,426.32

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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.