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Finding the Fourth Proportional to 141,259.78, 194,791.53 and 105,392.98

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Solution

The fourth proportional to 141,259.78, 194,791.53 and 105,392.98 is: 145,332.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,259.78 : 194,791.53 = 105,392.98 : x
  2. Step 2: Convert to fraction form
    141,259.78/194,791.53 = 105,392.98/x
  3. Step 3: Cross multiply
    141,259.78x = 194,791.53 × 105,392.98
  4. Step 4: Simplify right side
    141,259.78x = 20,529,659,825.46
  5. Step 5: Solve for x
    x = 20,529,659,825.46/141,259.78
  6. Step 6: Final answer
    x = 145,332.66

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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.