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Finding the Fourth Proportional to 120,783.21, 166,696.21 and 73,036.90

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Solution

The fourth proportional to 120,783.21, 166,696.21 and 73,036.90 is: 100,800.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,783.21 : 166,696.21 = 73,036.90 : x
  2. Step 2: Convert to fraction form
    120,783.21/166,696.21 = 73,036.90/x
  3. Step 3: Cross multiply
    120,783.21x = 166,696.21 × 73,036.90
  4. Step 4: Simplify right side
    120,783.21x = 12,174,974,582.87
  5. Step 5: Solve for x
    x = 12,174,974,582.87/120,783.21
  6. Step 6: Final answer
    x = 100,800.22

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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.