Home / 427,117.56-640,682.55-111,574.50

Finding the Fourth Proportional to 427,117.56, 640,682.55 and 111,574.50

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Solution

The fourth proportional to 427,117.56, 640,682.55 and 111,574.50 is: 167,363.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,117.56 : 640,682.55 = 111,574.50 : x
  2. Step 2: Convert to fraction form
    427,117.56/640,682.55 = 111,574.50/x
  3. Step 3: Cross multiply
    427,117.56x = 640,682.55 × 111,574.50
  4. Step 4: Simplify right side
    427,117.56x = 71,483,835,174.98
  5. Step 5: Solve for x
    x = 71,483,835,174.98/427,117.56
  6. Step 6: Final answer
    x = 167,363.37

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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.