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Finding the Fourth Proportional to 72,698,940.40, 108,915,700.20 and 44,298,914.80

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Solution

The fourth proportional to 72,698,940.40, 108,915,700.20 and 44,298,914.80 is: 66,367,505.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,698,940.40 : 108,915,700.20 = 44,298,914.80 : x
  2. Step 2: Convert to fraction form
    72,698,940.40/108,915,700.20 = 44,298,914.80/x
  3. Step 3: Cross multiply
    72,698,940.40x = 108,915,700.20 × 44,298,914.80
  4. Step 4: Simplify right side
    72,698,940.40x = 4,824,847,323,542,143
  5. Step 5: Solve for x
    x = 4,824,847,323,542,143/72,698,940.40
  6. Step 6: Final answer
    x = 66,367,505.45

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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.