Home / 427,115.56-640,679.55-111,572.50

Finding the Fourth Proportional to 427,115.56, 640,679.55 and 111,572.50

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Solution

The fourth proportional to 427,115.56, 640,679.55 and 111,572.50 is: 167,360.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    427,115.56 : 640,679.55 = 111,572.50 : x
  2. Step 2: Convert to fraction form
    427,115.56/640,679.55 = 111,572.50/x
  3. Step 3: Cross multiply
    427,115.56x = 640,679.55 × 111,572.50
  4. Step 4: Simplify right side
    427,115.56x = 71,482,219,092.38
  5. Step 5: Solve for x
    x = 71,482,219,092.38/427,115.56
  6. Step 6: Final answer
    x = 167,360.37

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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.