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Finding the Fourth Proportional to 141,873.40, 212,712.90 and 67,029.40

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Solution

The fourth proportional to 141,873.40, 212,712.90 and 67,029.40 is: 100,498.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,873.40 : 212,712.90 = 67,029.40 : x
  2. Step 2: Convert to fraction form
    141,873.40/212,712.90 = 67,029.40/x
  3. Step 3: Cross multiply
    141,873.40x = 212,712.90 × 67,029.40
  4. Step 4: Simplify right side
    141,873.40x = 14,258,018,059.26
  5. Step 5: Solve for x
    x = 14,258,018,059.26/141,873.40
  6. Step 6: Final answer
    x = 100,498.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.