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Finding the Fourth Proportional to 140,354.55, 193,894.18 and 121,458.87

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Solution

The fourth proportional to 140,354.55, 193,894.18 and 121,458.87 is: 167,790.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,354.55 : 193,894.18 = 121,458.87 : x
  2. Step 2: Convert to fraction form
    140,354.55/193,894.18 = 121,458.87/x
  3. Step 3: Cross multiply
    140,354.55x = 193,894.18 × 121,458.87
  4. Step 4: Simplify right side
    140,354.55x = 23,550,168,002.38
  5. Step 5: Solve for x
    x = 23,550,168,002.38/140,354.55
  6. Step 6: Final answer
    x = 167,790.56

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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.