Home / 427,154.85-640,683.68-111,643.65

Finding the Fourth Proportional to 427,154.85, 640,683.68 and 111,643.65

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Solution

The fourth proportional to 427,154.85, 640,683.68 and 111,643.65 is: 167,452.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,154.85 : 640,683.68 = 111,643.65 : x
  2. Step 2: Convert to fraction form
    427,154.85/640,683.68 = 111,643.65/x
  3. Step 3: Cross multiply
    427,154.85x = 640,683.68 × 111,643.65
  4. Step 4: Simplify right side
    427,154.85x = 71,528,263,972.41
  5. Step 5: Solve for x
    x = 71,528,263,972.41/427,154.85
  6. Step 6: Final answer
    x = 167,452.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.