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Finding the Fourth Proportional to 207,158.31, 285,835.59 and 121,100.67

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Solution

The fourth proportional to 207,158.31, 285,835.59 and 121,100.67 is: 167,093.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,158.31 : 285,835.59 = 121,100.67 : x
  2. Step 2: Convert to fraction form
    207,158.31/285,835.59 = 121,100.67/x
  3. Step 3: Cross multiply
    207,158.31x = 285,835.59 × 121,100.67
  4. Step 4: Simplify right side
    207,158.31x = 34,614,881,458.85
  5. Step 5: Solve for x
    x = 34,614,881,458.85/207,158.31
  6. Step 6: Final answer
    x = 167,093.86

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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.