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Finding the Fourth Proportional to 86,978.99, 120,027.45 and 50,683.90

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Solution

The fourth proportional to 86,978.99, 120,027.45 and 50,683.90 is: 69,941.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,978.99 : 120,027.45 = 50,683.90 : x
  2. Step 2: Convert to fraction form
    86,978.99/120,027.45 = 50,683.90/x
  3. Step 3: Cross multiply
    86,978.99x = 120,027.45 × 50,683.90
  4. Step 4: Simplify right side
    86,978.99x = 6,083,459,273.06
  5. Step 5: Solve for x
    x = 6,083,459,273.06/86,978.99
  6. Step 6: Final answer
    x = 69,941.71

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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.