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Finding the Fourth Proportional to 251,954.66, 347,672.20 and 155,143

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Solution

The fourth proportional to 251,954.66, 347,672.20 and 155,143 is: 214,081.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    251,954.66 : 347,672.20 = 155,143 : x
  2. Step 2: Convert to fraction form
    251,954.66/347,672.20 = 155,143/x
  3. Step 3: Cross multiply
    251,954.66x = 347,672.20 × 155,143
  4. Step 4: Simplify right side
    251,954.66x = 53,938,908,124.60
  5. Step 5: Solve for x
    x = 53,938,908,124.60/251,954.66
  6. Step 6: Final answer
    x = 214,081.80

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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.