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Finding the Fourth Proportional to 71,208,007.20, 106,812,010.80 and 20,089,360.80

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Solution

The fourth proportional to 71,208,007.20, 106,812,010.80 and 20,089,360.80 is: 30,134,041.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,208,007.20 : 106,812,010.80 = 20,089,360.80 : x
  2. Step 2: Convert to fraction form
    71,208,007.20/106,812,010.80 = 20,089,360.80/x
  3. Step 3: Cross multiply
    71,208,007.20x = 106,812,010.80 × 20,089,360.80
  4. Step 4: Simplify right side
    71,208,007.20x = 2,145,785,022,734,696.75
  5. Step 5: Solve for x
    x = 2,145,785,022,734,696.75/71,208,007.20
  6. Step 6: Final answer
    x = 30,134,041.20

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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.