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Finding the Fourth Proportional to 154,272.51, 212,893.25 and 87,204.51

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Solution

The fourth proportional to 154,272.51, 212,893.25 and 87,204.51 is: 120,340.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,272.51 : 212,893.25 = 87,204.51 : x
  2. Step 2: Convert to fraction form
    154,272.51/212,893.25 = 87,204.51/x
  3. Step 3: Cross multiply
    154,272.51x = 212,893.25 × 87,204.51
  4. Step 4: Simplify right side
    154,272.51x = 18,565,251,112.54
  5. Step 5: Solve for x
    x = 18,565,251,112.54/154,272.51
  6. Step 6: Final answer
    x = 120,340.63

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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.