Home / 138,128,085-190,610,055.36-78,583,773.24

Finding the Fourth Proportional to 138,128,085, 190,610,055.36 and 78,583,773.24

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Solution

The fourth proportional to 138,128,085, 190,610,055.36 and 78,583,773.24 is: 108,441,794.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,128,085 : 190,610,055.36 = 78,583,773.24 : x
  2. Step 2: Convert to fraction form
    138,128,085/190,610,055.36 = 78,583,773.24/x
  3. Step 3: Cross multiply
    138,128,085x = 190,610,055.36 × 78,583,773.24
  4. Step 4: Simplify right side
    138,128,085x = 14,978,857,367,674,086
  5. Step 5: Solve for x
    x = 14,978,857,367,674,086/138,128,085
  6. Step 6: Final answer
    x = 108,441,794.21

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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.