Home / 138,299,970.70-190,864,839.19-78,763,784.32

Finding the Fourth Proportional to 138,299,970.70, 190,864,839.19 and 78,763,784.32

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Solution

The fourth proportional to 138,299,970.70, 190,864,839.19 and 78,763,784.32 is: 108,700,218.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,299,970.70 : 190,864,839.19 = 78,763,784.32 : x
  2. Step 2: Convert to fraction form
    138,299,970.70/190,864,839.19 = 78,763,784.32/x
  3. Step 3: Cross multiply
    138,299,970.70x = 190,864,839.19 × 78,763,784.32
  4. Step 4: Simplify right side
    138,299,970.70x = 15,033,237,028,232,642
  5. Step 5: Solve for x
    x = 15,033,237,028,232,642/138,299,970.70
  6. Step 6: Final answer
    x = 108,700,218.46

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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.