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Finding the Fourth Proportional to 117,699.51, 162,421.90 and 66,716.93

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Solution

The fourth proportional to 117,699.51, 162,421.90 and 66,716.93 is: 92,067.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    117,699.51 : 162,421.90 = 66,716.93 : x
  2. Step 2: Convert to fraction form
    117,699.51/162,421.90 = 66,716.93/x
  3. Step 3: Cross multiply
    117,699.51x = 162,421.90 × 66,716.93
  4. Step 4: Simplify right side
    117,699.51x = 10,836,290,532.77
  5. Step 5: Solve for x
    x = 10,836,290,532.77/117,699.51
  6. Step 6: Final answer
    x = 92,067.42

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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.