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Finding the Fourth Proportional to 154,498.88, 213,165.60 and 87,429.44

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Solution

The fourth proportional to 154,498.88, 213,165.60 and 87,429.44 is: 120,628.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,498.88 : 213,165.60 = 87,429.44 : x
  2. Step 2: Convert to fraction form
    154,498.88/213,165.60 = 87,429.44/x
  3. Step 3: Cross multiply
    154,498.88x = 213,165.60 × 87,429.44
  4. Step 4: Simplify right side
    154,498.88x = 18,636,949,035.26
  5. Step 5: Solve for x
    x = 18,636,949,035.26/154,498.88
  6. Step 6: Final answer
    x = 120,628.38

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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.