Home / 154,291.41-212,939.79-86,325.60

Finding the Fourth Proportional to 154,291.41, 212,939.79 and 86,325.60

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Solution

The fourth proportional to 154,291.41, 212,939.79 and 86,325.60 is: 119,139.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,291.41 : 212,939.79 = 86,325.60 : x
  2. Step 2: Convert to fraction form
    154,291.41/212,939.79 = 86,325.60/x
  3. Step 3: Cross multiply
    154,291.41x = 212,939.79 × 86,325.60
  4. Step 4: Simplify right side
    154,291.41x = 18,382,155,135.62
  5. Step 5: Solve for x
    x = 18,382,155,135.62/154,291.41
  6. Step 6: Final answer
    x = 119,139.20

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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.