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Finding the Fourth Proportional to 61,989.60, 93,027.60 and 39,856.80

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Solution

The fourth proportional to 61,989.60, 93,027.60 and 39,856.80 is: 59,812.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    61,989.60 : 93,027.60 = 39,856.80 : x
  2. Step 2: Convert to fraction form
    61,989.60/93,027.60 = 39,856.80/x
  3. Step 3: Cross multiply
    61,989.60x = 93,027.60 × 39,856.80
  4. Step 4: Simplify right side
    61,989.60x = 3,707,782,447.68
  5. Step 5: Solve for x
    x = 3,707,782,447.68/61,989.60
  6. Step 6: Final answer
    x = 59,812.98

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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.