Home / 138,299,969.70-190,864,837.81-78,763,783.32

Finding the Fourth Proportional to 138,299,969.70, 190,864,837.81 and 78,763,783.32

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Solution

The fourth proportional to 138,299,969.70, 190,864,837.81 and 78,763,783.32 is: 108,700,217.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,299,969.70 : 190,864,837.81 = 78,763,783.32 : x
  2. Step 2: Convert to fraction form
    138,299,969.70/190,864,837.81 = 78,763,783.32/x
  3. Step 3: Cross multiply
    138,299,969.70x = 190,864,837.81 × 78,763,783.32
  4. Step 4: Simplify right side
    138,299,969.70x = 15,033,236,728,673,782
  5. Step 5: Solve for x
    x = 15,033,236,728,673,782/138,299,969.70
  6. Step 6: Final answer
    x = 108,700,217.08

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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.