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Finding the Fourth Proportional to 131,990,542.40, 197,985,813.60 and 97,978,318.40

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Solution

The fourth proportional to 131,990,542.40, 197,985,813.60 and 97,978,318.40 is: 146,967,477.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,990,542.40 : 197,985,813.60 = 97,978,318.40 : x
  2. Step 2: Convert to fraction form
    131,990,542.40/197,985,813.60 = 97,978,318.40/x
  3. Step 3: Cross multiply
    131,990,542.40x = 197,985,813.60 × 97,978,318.40
  4. Step 4: Simplify right side
    131,990,542.40x = 19,398,317,083,583,852
  5. Step 5: Solve for x
    x = 19,398,317,083,583,852/131,990,542.40
  6. Step 6: Final answer
    x = 146,967,477.60

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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.