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Finding the Fourth Proportional to 141,672.70, 212,314.65 and 115,428.70

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Solution

The fourth proportional to 141,672.70, 212,314.65 and 115,428.70 is: 172,984.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    141,672.70 : 212,314.65 = 115,428.70 : x
  2. Step 2: Convert to fraction form
    141,672.70/212,314.65 = 115,428.70/x
  3. Step 3: Cross multiply
    141,672.70x = 212,314.65 × 115,428.70
  4. Step 4: Simplify right side
    141,672.70x = 24,507,204,040.46
  5. Step 5: Solve for x
    x = 24,507,204,040.46/141,672.70
  6. Step 6: Final answer
    x = 172,984.66

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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.