Home / 120,132,374-165,919,533.72-81,434,021.36

Finding the Fourth Proportional to 120,132,374, 165,919,533.72 and 81,434,021.36

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Solution

The fourth proportional to 120,132,374, 165,919,533.72 and 81,434,021.36 is: 112,471,721.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,132,374 : 165,919,533.72 = 81,434,021.36 : x
  2. Step 2: Convert to fraction form
    120,132,374/165,919,533.72 = 81,434,021.36/x
  3. Step 3: Cross multiply
    120,132,374x = 165,919,533.72 × 81,434,021.36
  4. Step 4: Simplify right side
    120,132,374x = 13,511,494,852,995,720
  5. Step 5: Solve for x
    x = 13,511,494,852,995,720/120,132,374
  6. Step 6: Final answer
    x = 112,471,721.01

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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.