Home / 138,784,907.20-208,028,061.60-52,489,969.60

Finding the Fourth Proportional to 138,784,907.20, 208,028,061.60 and 52,489,969.60

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Solution

The fourth proportional to 138,784,907.20, 208,028,061.60 and 52,489,969.60 is: 78,678,487.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,784,907.20 : 208,028,061.60 = 52,489,969.60 : x
  2. Step 2: Convert to fraction form
    138,784,907.20/208,028,061.60 = 52,489,969.60/x
  3. Step 3: Cross multiply
    138,784,907.20x = 208,028,061.60 × 52,489,969.60
  4. Step 4: Simplify right side
    138,784,907.20x = 10,919,386,629,330,928
  5. Step 5: Solve for x
    x = 10,919,386,629,330,928/138,784,907.20
  6. Step 6: Final answer
    x = 78,678,487.81

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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.