Home / 154,121.56-212,686.97-86,138.51

Finding the Fourth Proportional to 154,121.56, 212,686.97 and 86,138.51

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Solution

The fourth proportional to 154,121.56, 212,686.97 and 86,138.51 is: 118,870.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,121.56 : 212,686.97 = 86,138.51 : x
  2. Step 2: Convert to fraction form
    154,121.56/212,686.97 = 86,138.51/x
  3. Step 3: Cross multiply
    154,121.56x = 212,686.97 × 86,138.51
  4. Step 4: Simplify right side
    154,121.56x = 18,320,537,198.09
  5. Step 5: Solve for x
    x = 18,320,537,198.09/154,121.56
  6. Step 6: Final answer
    x = 118,870.70

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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.