Home / 154,682,011.72-213,456,915.12-85,067,385.28

Finding the Fourth Proportional to 154,682,011.72, 213,456,915.12 and 85,067,385.28

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Solution

The fourth proportional to 154,682,011.72, 213,456,915.12 and 85,067,385.28 is: 117,390,648.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,682,011.72 : 213,456,915.12 = 85,067,385.28 : x
  2. Step 2: Convert to fraction form
    154,682,011.72/213,456,915.12 = 85,067,385.28/x
  3. Step 3: Cross multiply
    154,682,011.72x = 213,456,915.12 × 85,067,385.28
  4. Step 4: Simplify right side
    154,682,011.72x = 18,158,221,639,193,300
  5. Step 5: Solve for x
    x = 18,158,221,639,193,300/154,682,011.72
  6. Step 6: Final answer
    x = 117,390,648.32

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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.