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Finding the Fourth Proportional to 212,339.31, 293,029.29 and 121,700.67

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Solution

The fourth proportional to 212,339.31, 293,029.29 and 121,700.67 is: 167,947.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,339.31 : 293,029.29 = 121,700.67 : x
  2. Step 2: Convert to fraction form
    212,339.31/293,029.29 = 121,700.67/x
  3. Step 3: Cross multiply
    212,339.31x = 293,029.29 × 121,700.67
  4. Step 4: Simplify right side
    212,339.31x = 35,661,860,922.62
  5. Step 5: Solve for x
    x = 35,661,860,922.62/212,339.31
  6. Step 6: Final answer
    x = 167,947.52

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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.