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Finding the Fourth Proportional to 120,906.90, 181,141.65 and 103,410.90

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Solution

The fourth proportional to 120,906.90, 181,141.65 and 103,410.90 is: 154,929.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,906.90 : 181,141.65 = 103,410.90 : x
  2. Step 2: Convert to fraction form
    120,906.90/181,141.65 = 103,410.90/x
  3. Step 3: Cross multiply
    120,906.90x = 181,141.65 × 103,410.90
  4. Step 4: Simplify right side
    120,906.90x = 18,732,021,053.99
  5. Step 5: Solve for x
    x = 18,732,021,053.99/120,906.90
  6. Step 6: Final answer
    x = 154,929.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.