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Finding the Fourth Proportional to 69,409,813.60, 104,043,861.60 and 40,641,140.80

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Solution

The fourth proportional to 69,409,813.60, 104,043,861.60 and 40,641,140.80 is: 60,920,221.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,409,813.60 : 104,043,861.60 = 40,641,140.80 : x
  2. Step 2: Convert to fraction form
    69,409,813.60/104,043,861.60 = 40,641,140.80/x
  3. Step 3: Cross multiply
    69,409,813.60x = 104,043,861.60 × 40,641,140.80
  4. Step 4: Simplify right side
    69,409,813.60x = 4,228,461,228,661,312.50
  5. Step 5: Solve for x
    x = 4,228,461,228,661,312.50/69,409,813.60
  6. Step 6: Final answer
    x = 60,920,221.64

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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.