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Finding the Fourth Proportional to 117,239, 161,787.69 and 66,250.63

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Solution

The fourth proportional to 117,239, 161,787.69 and 66,250.63 is: 91,424.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,239 : 161,787.69 = 66,250.63 : x
  2. Step 2: Convert to fraction form
    117,239/161,787.69 = 66,250.63/x
  3. Step 3: Cross multiply
    117,239x = 161,787.69 × 66,250.63
  4. Step 4: Simplify right side
    117,239x = 10,718,536,388.74
  5. Step 5: Solve for x
    x = 10,718,536,388.74/117,239
  6. Step 6: Final answer
    x = 91,424.67

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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.