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Finding the Fourth Proportional to 8,321,764.80, 12,482,647.20 and 7,104,043.20

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Solution

The fourth proportional to 8,321,764.80, 12,482,647.20 and 7,104,043.20 is: 10,656,064.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,321,764.80 : 12,482,647.20 = 7,104,043.20 : x
  2. Step 2: Convert to fraction form
    8,321,764.80/12,482,647.20 = 7,104,043.20/x
  3. Step 3: Cross multiply
    8,321,764.80x = 12,482,647.20 × 7,104,043.20
  4. Step 4: Simplify right side
    8,321,764.80x = 88,677,264,959,159.03
  5. Step 5: Solve for x
    x = 88,677,264,959,159.03/8,321,764.80
  6. Step 6: Final answer
    x = 10,656,064.80

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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.