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Finding the Fourth Proportional to 129,460.48, 193,941.96 and 79,394.64

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Solution

The fourth proportional to 129,460.48, 193,941.96 and 79,394.64 is: 118,939.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,460.48 : 193,941.96 = 79,394.64 : x
  2. Step 2: Convert to fraction form
    129,460.48/193,941.96 = 79,394.64/x
  3. Step 3: Cross multiply
    129,460.48x = 193,941.96 × 79,394.64
  4. Step 4: Simplify right side
    129,460.48x = 15,397,952,095.09
  5. Step 5: Solve for x
    x = 15,397,952,095.09/129,460.48
  6. Step 6: Final answer
    x = 118,939.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.