Home / 154,421.34-213,083.51-86,442.09

Finding the Fourth Proportional to 154,421.34, 213,083.51 and 86,442.09

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Solution

The fourth proportional to 154,421.34, 213,083.51 and 86,442.09 is: 119,280.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,421.34 : 213,083.51 = 86,442.09 : x
  2. Step 2: Convert to fraction form
    154,421.34/213,083.51 = 86,442.09/x
  3. Step 3: Cross multiply
    154,421.34x = 213,083.51 × 86,442.09
  4. Step 4: Simplify right side
    154,421.34x = 18,419,383,203.90
  5. Step 5: Solve for x
    x = 18,419,383,203.90/154,421.34
  6. Step 6: Final answer
    x = 119,280.04

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1.5x scale

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.