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Finding the Fourth Proportional to 223,879.70, 308,953.50 and 121,903.58

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Solution

The fourth proportional to 223,879.70, 308,953.50 and 121,903.58 is: 168,226.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,879.70 : 308,953.50 = 121,903.58 : x
  2. Step 2: Convert to fraction form
    223,879.70/308,953.50 = 121,903.58/x
  3. Step 3: Cross multiply
    223,879.70x = 308,953.50 × 121,903.58
  4. Step 4: Simplify right side
    223,879.70x = 37,662,537,703.53
  5. Step 5: Solve for x
    x = 37,662,537,703.53/223,879.70
  6. Step 6: Final answer
    x = 168,226.68

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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.