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Finding the Fourth Proportional to 72,940.40, 109,410.60 and 35,999.60

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Solution

The fourth proportional to 72,940.40, 109,410.60 and 35,999.60 is: 53,999.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,940.40 : 109,410.60 = 35,999.60 : x
  2. Step 2: Convert to fraction form
    72,940.40/109,410.60 = 35,999.60/x
  3. Step 3: Cross multiply
    72,940.40x = 109,410.60 × 35,999.60
  4. Step 4: Simplify right side
    72,940.40x = 3,938,737,835.76
  5. Step 5: Solve for x
    x = 3,938,737,835.76/72,940.40
  6. Step 6: Final answer
    x = 53,999.40

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1.5x scale

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.