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Finding the Fourth Proportional to 154,081.50, 212,649.75 and 87,017.82

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Solution

The fourth proportional to 154,081.50, 212,649.75 and 87,017.82 is: 120,094.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,081.50 : 212,649.75 = 87,017.82 : x
  2. Step 2: Convert to fraction form
    154,081.50/212,649.75 = 87,017.82/x
  3. Step 3: Cross multiply
    154,081.50x = 212,649.75 × 87,017.82
  4. Step 4: Simplify right side
    154,081.50x = 18,504,317,668.55
  5. Step 5: Solve for x
    x = 18,504,317,668.55/154,081.50
  6. Step 6: Final answer
    x = 120,094.35

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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.