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Finding the Fourth Proportional to 223,488.60, 308,409.72 and 121,516.08

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Solution

The fourth proportional to 223,488.60, 308,409.72 and 121,516.08 is: 167,689.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,488.60 : 308,409.72 = 121,516.08 : x
  2. Step 2: Convert to fraction form
    223,488.60/308,409.72 = 121,516.08/x
  3. Step 3: Cross multiply
    223,488.60x = 308,409.72 × 121,516.08
  4. Step 4: Simplify right side
    223,488.60x = 37,476,740,208.30
  5. Step 5: Solve for x
    x = 37,476,740,208.30/223,488.60
  6. Step 6: Final answer
    x = 167,689.72

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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.