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Finding the Fourth Proportional to 215,188.50, 296,960.13 and 120,980.50

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Solution

The fourth proportional to 215,188.50, 296,960.13 and 120,980.50 is: 166,953.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,188.50 : 296,960.13 = 120,980.50 : x
  2. Step 2: Convert to fraction form
    215,188.50/296,960.13 = 120,980.50/x
  3. Step 3: Cross multiply
    215,188.50x = 296,960.13 × 120,980.50
  4. Step 4: Simplify right side
    215,188.50x = 35,926,385,007.47
  5. Step 5: Solve for x
    x = 35,926,385,007.47/215,188.50
  6. Step 6: Final answer
    x = 166,953.09

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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.