Home / 105,486.81-145,571.96-57,743.18

Finding the Fourth Proportional to 105,486.81, 145,571.96 and 57,743.18

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Solution

The fourth proportional to 105,486.81, 145,571.96 and 57,743.18 is: 79,685.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,486.81 : 145,571.96 = 57,743.18 : x
  2. Step 2: Convert to fraction form
    105,486.81/145,571.96 = 57,743.18/x
  3. Step 3: Cross multiply
    105,486.81x = 145,571.96 × 57,743.18
  4. Step 4: Simplify right side
    105,486.81x = 8,405,787,600.52
  5. Step 5: Solve for x
    x = 8,405,787,600.52/105,486.81
  6. Step 6: Final answer
    x = 79,685.67

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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.