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Finding the Fourth Proportional to 8,298,081.60, 12,465,784.80 and 7,980,820.80

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Solution

The fourth proportional to 8,298,081.60, 12,465,784.80 and 7,980,820.80 is: 11,989,180.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,298,081.60 : 12,465,784.80 = 7,980,820.80 : x
  2. Step 2: Convert to fraction form
    8,298,081.60/12,465,784.80 = 7,980,820.80/x
  3. Step 3: Cross multiply
    8,298,081.60x = 12,465,784.80 × 7,980,820.80
  4. Step 4: Simplify right side
    8,298,081.60x = 99,487,194,620,163.84
  5. Step 5: Solve for x
    x = 99,487,194,620,163.84/8,298,081.60
  6. Step 6: Final answer
    x = 11,989,180.08

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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.