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Finding the Fourth Proportional to 354,447.72, 531,700.38 and 105,129

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Solution

The fourth proportional to 354,447.72, 531,700.38 and 105,129 is: 157,702.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,447.72 : 531,700.38 = 105,129 : x
  2. Step 2: Convert to fraction form
    354,447.72/531,700.38 = 105,129/x
  3. Step 3: Cross multiply
    354,447.72x = 531,700.38 × 105,129
  4. Step 4: Simplify right side
    354,447.72x = 55,897,129,249.02
  5. Step 5: Solve for x
    x = 55,897,129,249.02/354,447.72
  6. Step 6: Final answer
    x = 157,702.04

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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.