Home / 105,515.71-145,605.93-57,759.83

Finding the Fourth Proportional to 105,515.71, 145,605.93 and 57,759.83

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Solution

The fourth proportional to 105,515.71, 145,605.93 and 57,759.83 is: 79,705.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,515.71 : 145,605.93 = 57,759.83 : x
  2. Step 2: Convert to fraction form
    105,515.71/145,605.93 = 57,759.83/x
  3. Step 3: Cross multiply
    105,515.71x = 145,605.93 × 57,759.83
  4. Step 4: Simplify right side
    105,515.71x = 8,410,173,763.79
  5. Step 5: Solve for x
    x = 8,410,173,763.79/105,515.71
  6. Step 6: Final answer
    x = 79,705.42

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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.