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Finding the Fourth Proportional to 120,949, 166,909.62 and 70,648.36

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Solution

The fourth proportional to 120,949, 166,909.62 and 70,648.36 is: 97,494.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,949 : 166,909.62 = 70,648.36 : x
  2. Step 2: Convert to fraction form
    120,949/166,909.62 = 70,648.36/x
  3. Step 3: Cross multiply
    120,949x = 166,909.62 × 70,648.36
  4. Step 4: Simplify right side
    120,949x = 11,791,890,921.22
  5. Step 5: Solve for x
    x = 11,791,890,921.22/120,949
  6. Step 6: Final answer
    x = 97,494.74

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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.