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Finding the Fourth Proportional to 43,699,572.80, 65,624,008.80 and 28,620,353.60

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Solution

The fourth proportional to 43,699,572.80, 65,624,008.80 and 28,620,353.60 is: 42,979,420.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    43,699,572.80 : 65,624,008.80 = 28,620,353.60 : x
  2. Step 2: Convert to fraction form
    43,699,572.80/65,624,008.80 = 28,620,353.60/x
  3. Step 3: Cross multiply
    43,699,572.80x = 65,624,008.80 × 28,620,353.60
  4. Step 4: Simplify right side
    43,699,572.80x = 1,878,182,336,505,511.75
  5. Step 5: Solve for x
    x = 1,878,182,336,505,511.75/43,699,572.80
  6. Step 6: Final answer
    x = 42,979,420.99

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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.