Home / 128,645.23-177,617.05-80,320.73

Finding the Fourth Proportional to 128,645.23, 177,617.05 and 80,320.73

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Solution

The fourth proportional to 128,645.23, 177,617.05 and 80,320.73 is: 110,896.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,645.23 : 177,617.05 = 80,320.73 : x
  2. Step 2: Convert to fraction form
    128,645.23/177,617.05 = 80,320.73/x
  3. Step 3: Cross multiply
    128,645.23x = 177,617.05 × 80,320.73
  4. Step 4: Simplify right side
    128,645.23x = 14,266,331,478.46
  5. Step 5: Solve for x
    x = 14,266,331,478.46/128,645.23
  6. Step 6: Final answer
    x = 110,896.70

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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.