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Finding the Fourth Proportional to 131,405.60, 196,881.60 and 61,140.80

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Solution

The fourth proportional to 131,405.60, 196,881.60 and 61,140.80 is: 91,605.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,405.60 : 196,881.60 = 61,140.80 : x
  2. Step 2: Convert to fraction form
    131,405.60/196,881.60 = 61,140.80/x
  3. Step 3: Cross multiply
    131,405.60x = 196,881.60 × 61,140.80
  4. Step 4: Simplify right side
    131,405.60x = 12,037,498,529.28
  5. Step 5: Solve for x
    x = 12,037,498,529.28/131,405.60
  6. Step 6: Final answer
    x = 91,605.67

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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.