Home / 105,690.78-145,852.50-57,943.30

Finding the Fourth Proportional to 105,690.78, 145,852.50 and 57,943.30

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Solution

The fourth proportional to 105,690.78, 145,852.50 and 57,943.30 is: 79,961.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,690.78 : 145,852.50 = 57,943.30 : x
  2. Step 2: Convert to fraction form
    105,690.78/145,852.50 = 57,943.30/x
  3. Step 3: Cross multiply
    105,690.78x = 145,852.50 × 57,943.30
  4. Step 4: Simplify right side
    105,690.78x = 8,451,175,163.25
  5. Step 5: Solve for x
    x = 8,451,175,163.25/105,690.78
  6. Step 6: Final answer
    x = 79,961.33

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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.