Home / 105,639.12-145,782.41-57,241.14

Finding the Fourth Proportional to 105,639.12, 145,782.41 and 57,241.14

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Solution

The fourth proportional to 105,639.12, 145,782.41 and 57,241.14 is: 78,993.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,639.12 : 145,782.41 = 57,241.14 : x
  2. Step 2: Convert to fraction form
    105,639.12/145,782.41 = 57,241.14/x
  3. Step 3: Cross multiply
    105,639.12x = 145,782.41 × 57,241.14
  4. Step 4: Simplify right side
    105,639.12x = 8,344,751,340.35
  5. Step 5: Solve for x
    x = 8,344,751,340.35/105,639.12
  6. Step 6: Final answer
    x = 78,993.00

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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.