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Finding the Fourth Proportional to 181,978,904.40, 272,968,356.60 and 79,942,232.40

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Solution

The fourth proportional to 181,978,904.40, 272,968,356.60 and 79,942,232.40 is: 119,913,348.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    181,978,904.40 : 272,968,356.60 = 79,942,232.40 : x
  2. Step 2: Convert to fraction form
    181,978,904.40/272,968,356.60 = 79,942,232.40/x
  3. Step 3: Cross multiply
    181,978,904.40x = 272,968,356.60 × 79,942,232.40
  4. Step 4: Simplify right side
    181,978,904.40x = 21,821,699,801,163,276
  5. Step 5: Solve for x
    x = 21,821,699,801,163,276/181,978,904.40
  6. Step 6: Final answer
    x = 119,913,348.60

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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.