Home / 80,513,134.40-120,769,701.60-68,041,985.60

Finding the Fourth Proportional to 80,513,134.40, 120,769,701.60 and 68,041,985.60

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Solution

The fourth proportional to 80,513,134.40, 120,769,701.60 and 68,041,985.60 is: 102,062,978.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,513,134.40 : 120,769,701.60 = 68,041,985.60 : x
  2. Step 2: Convert to fraction form
    80,513,134.40/120,769,701.60 = 68,041,985.60/x
  3. Step 3: Cross multiply
    80,513,134.40x = 120,769,701.60 × 68,041,985.60
  4. Step 4: Simplify right side
    80,513,134.40x = 8,217,410,297,183,496
  5. Step 5: Solve for x
    x = 8,217,410,297,183,496/80,513,134.40
  6. Step 6: Final answer
    x = 102,062,978.40

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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.