Home / 138,299,971.54-190,864,840.32-78,763,785.20

Finding the Fourth Proportional to 138,299,971.54, 190,864,840.32 and 78,763,785.20

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Solution

The fourth proportional to 138,299,971.54, 190,864,840.32 and 78,763,785.20 is: 108,700,219.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,299,971.54 : 190,864,840.32 = 78,763,785.20 : x
  2. Step 2: Convert to fraction form
    138,299,971.54/190,864,840.32 = 78,763,785.20/x
  3. Step 3: Cross multiply
    138,299,971.54x = 190,864,840.32 × 78,763,785.20
  4. Step 4: Simplify right side
    138,299,971.54x = 15,033,237,285,196,780
  5. Step 5: Solve for x
    x = 15,033,237,285,196,780/138,299,971.54
  6. Step 6: Final answer
    x = 108,700,219.66

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.