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Finding the Fourth Proportional to 223,397.89, 308,291.15 and 121,423.58

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Solution

The fourth proportional to 223,397.89, 308,291.15 and 121,423.58 is: 167,565.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    223,397.89 : 308,291.15 = 121,423.58 : x
  2. Step 2: Convert to fraction form
    223,397.89/308,291.15 = 121,423.58/x
  3. Step 3: Cross multiply
    223,397.89x = 308,291.15 × 121,423.58
  4. Step 4: Simplify right side
    223,397.89x = 37,433,816,189.60
  5. Step 5: Solve for x
    x = 37,433,816,189.60/223,397.89
  6. Step 6: Final answer
    x = 167,565.67

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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.