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Finding the Fourth Proportional to 222,521.80, 307,074.90 and 121,917.64

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Solution

The fourth proportional to 222,521.80, 307,074.90 and 121,917.64 is: 168,243.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    222,521.80 : 307,074.90 = 121,917.64 : x
  2. Step 2: Convert to fraction form
    222,521.80/307,074.90 = 121,917.64/x
  3. Step 3: Cross multiply
    222,521.80x = 307,074.90 × 121,917.64
  4. Step 4: Simplify right side
    222,521.80x = 37,437,847,111.24
  5. Step 5: Solve for x
    x = 37,437,847,111.24/222,521.80
  6. Step 6: Final answer
    x = 168,243.50

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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.