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Finding the Fourth Proportional to 121,120.90, 166,973.59 and 85,199.42

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Solution

The fourth proportional to 121,120.90, 166,973.59 and 85,199.42 is: 117,453.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,120.90 : 166,973.59 = 85,199.42 : x
  2. Step 2: Convert to fraction form
    121,120.90/166,973.59 = 85,199.42/x
  3. Step 3: Cross multiply
    121,120.90x = 166,973.59 × 85,199.42
  4. Step 4: Simplify right side
    121,120.90x = 14,226,053,023.32
  5. Step 5: Solve for x
    x = 14,226,053,023.32/121,120.90
  6. Step 6: Final answer
    x = 117,453.33

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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.