Home / 128,581.75-177,529.51-80,257.28

Finding the Fourth Proportional to 128,581.75, 177,529.51 and 80,257.28

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Solution

The fourth proportional to 128,581.75, 177,529.51 and 80,257.28 is: 110,809.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,581.75 : 177,529.51 = 80,257.28 : x
  2. Step 2: Convert to fraction form
    128,581.75/177,529.51 = 80,257.28/x
  3. Step 3: Cross multiply
    128,581.75x = 177,529.51 × 80,257.28
  4. Step 4: Simplify right side
    128,581.75x = 14,248,035,851.46
  5. Step 5: Solve for x
    x = 14,248,035,851.46/128,581.75
  6. Step 6: Final answer
    x = 110,809.16

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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.