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Finding the Fourth Proportional to 171,629.63, 257,461.74 and 45,278.61

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Solution

The fourth proportional to 171,629.63, 257,461.74 and 45,278.61 is: 67,922.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    171,629.63 : 257,461.74 = 45,278.61 : x
  2. Step 2: Convert to fraction form
    171,629.63/257,461.74 = 45,278.61/x
  3. Step 3: Cross multiply
    171,629.63x = 257,461.74 × 45,278.61
  4. Step 4: Simplify right side
    171,629.63x = 11,657,509,715.38
  5. Step 5: Solve for x
    x = 11,657,509,715.38/171,629.63
  6. Step 6: Final answer
    x = 67,922.48

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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.