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Finding the Fourth Proportional to 80,643,539.60, 120,797,347.80 and 80,643,539.60

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Solution

The fourth proportional to 80,643,539.60, 120,797,347.80 and 80,643,539.60 is: 120,797,347.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,643,539.60 : 120,797,347.80 = 80,643,539.60 : x
  2. Step 2: Convert to fraction form
    80,643,539.60/120,797,347.80 = 80,643,539.60/x
  3. Step 3: Cross multiply
    80,643,539.60x = 120,797,347.80 × 80,643,539.60
  4. Step 4: Simplify right side
    80,643,539.60x = 9,741,525,700,884,272
  5. Step 5: Solve for x
    x = 9,741,525,700,884,272/80,643,539.60
  6. Step 6: Final answer
    x = 120,797,347.80

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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.