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Finding the Fourth Proportional to 69,011,978.40, 103,517,967.60 and 68,564,080.80

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Solution

The fourth proportional to 69,011,978.40, 103,517,967.60 and 68,564,080.80 is: 102,846,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    69,011,978.40 : 103,517,967.60 = 68,564,080.80 : x
  2. Step 2: Convert to fraction form
    69,011,978.40/103,517,967.60 = 68,564,080.80/x
  3. Step 3: Cross multiply
    69,011,978.40x = 103,517,967.60 × 68,564,080.80
  4. Step 4: Simplify right side
    69,011,978.40x = 7,097,614,294,778,181
  5. Step 5: Solve for x
    x = 7,097,614,294,778,181/69,011,978.40
  6. Step 6: Final answer
    x = 102,846,121.20

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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.