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Finding the Fourth Proportional to 121,321,692, 181,982,538 and 40,542,660

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Solution

The fourth proportional to 121,321,692, 181,982,538 and 40,542,660 is: 60,813,990

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,321,692 : 181,982,538 = 40,542,660 : x
  2. Step 2: Convert to fraction form
    121,321,692/181,982,538 = 40,542,660/x
  3. Step 3: Cross multiply
    121,321,692x = 181,982,538 × 40,542,660
  4. Step 4: Simplify right side
    121,321,692x = 7,378,056,164,071,080
  5. Step 5: Solve for x
    x = 7,378,056,164,071,080/121,321,692
  6. Step 6: Final answer
    x = 60,813,990

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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.