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Finding the Fourth Proportional to 120,841.40, 166,821.78 and 75,544.60

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Solution

The fourth proportional to 120,841.40, 166,821.78 and 75,544.60 is: 104,289.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,841.40 : 166,821.78 = 75,544.60 : x
  2. Step 2: Convert to fraction form
    120,841.40/166,821.78 = 75,544.60/x
  3. Step 3: Cross multiply
    120,841.40x = 166,821.78 × 75,544.60
  4. Step 4: Simplify right side
    120,841.40x = 12,602,484,641.39
  5. Step 5: Solve for x
    x = 12,602,484,641.39/120,841.40
  6. Step 6: Final answer
    x = 104,289.46

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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.