Home / 128,956.84-177,977.82-72,371.32

Finding the Fourth Proportional to 128,956.84, 177,977.82 and 72,371.32

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Solution

The fourth proportional to 128,956.84, 177,977.82 and 72,371.32 is: 99,882.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,956.84 : 177,977.82 = 72,371.32 : x
  2. Step 2: Convert to fraction form
    128,956.84/177,977.82 = 72,371.32/x
  3. Step 3: Cross multiply
    128,956.84x = 177,977.82 × 72,371.32
  4. Step 4: Simplify right side
    128,956.84x = 12,880,489,764.12
  5. Step 5: Solve for x
    x = 12,880,489,764.12/128,956.84
  6. Step 6: Final answer
    x = 99,882.18

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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.