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Finding the Fourth Proportional to 7,149,978.80, 9,867,174.96 and 4,359,263.12

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Solution

The fourth proportional to 7,149,978.80, 9,867,174.96 and 4,359,263.12 is: 6,015,907.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,149,978.80 : 9,867,174.96 = 4,359,263.12 : x
  2. Step 2: Convert to fraction form
    7,149,978.80/9,867,174.96 = 4,359,263.12/x
  3. Step 3: Cross multiply
    7,149,978.80x = 9,867,174.96 × 4,359,263.12
  4. Step 4: Simplify right side
    7,149,978.80x = 43,013,611,901,715.48
  5. Step 5: Solve for x
    x = 43,013,611,901,715.48/7,149,978.80
  6. Step 6: Final answer
    x = 6,015,907.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.