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Finding the Fourth Proportional to 117,886.36, 162,687.10 and 66,212.55

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Solution

The fourth proportional to 117,886.36, 162,687.10 and 66,212.55 is: 91,375.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,886.36 : 162,687.10 = 66,212.55 : x
  2. Step 2: Convert to fraction form
    117,886.36/162,687.10 = 66,212.55/x
  3. Step 3: Cross multiply
    117,886.36x = 162,687.10 × 66,212.55
  4. Step 4: Simplify right side
    117,886.36x = 10,771,927,743.11
  5. Step 5: Solve for x
    x = 10,771,927,743.11/117,886.36
  6. Step 6: Final answer
    x = 91,375.52

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1.5x scale

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.