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Finding the Fourth Proportional to 131,990,480.40, 197,985,720.60 and 97,978,256.40

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Solution

The fourth proportional to 131,990,480.40, 197,985,720.60 and 97,978,256.40 is: 146,967,384.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,990,480.40 : 197,985,720.60 = 97,978,256.40 : x
  2. Step 2: Convert to fraction form
    131,990,480.40/197,985,720.60 = 97,978,256.40/x
  3. Step 3: Cross multiply
    131,990,480.40x = 197,985,720.60 × 97,978,256.40
  4. Step 4: Simplify right side
    131,990,480.40x = 19,398,295,696,485,564
  5. Step 5: Solve for x
    x = 19,398,295,696,485,564/131,990,480.40
  6. Step 6: Final answer
    x = 146,967,384.60

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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.