Home / 138,144,975.12-190,665,021.96-82,393,971.12

Finding the Fourth Proportional to 138,144,975.12, 190,665,021.96 and 82,393,971.12

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Solution

The fourth proportional to 138,144,975.12, 190,665,021.96 and 82,393,971.12 is: 113,718,564.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,144,975.12 : 190,665,021.96 = 82,393,971.12 : x
  2. Step 2: Convert to fraction form
    138,144,975.12/190,665,021.96 = 82,393,971.12/x
  3. Step 3: Cross multiply
    138,144,975.12x = 190,665,021.96 × 82,393,971.12
  4. Step 4: Simplify right side
    138,144,975.12x = 15,709,648,312,966,408
  5. Step 5: Solve for x
    x = 15,709,648,312,966,408/138,144,975.12
  6. Step 6: Final answer
    x = 113,718,564.86

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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.