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Finding the Fourth Proportional to 120,999.40, 181,499.10 and 91,474.90

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Solution

The fourth proportional to 120,999.40, 181,499.10 and 91,474.90 is: 137,212.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,999.40 : 181,499.10 = 91,474.90 : x
  2. Step 2: Convert to fraction form
    120,999.40/181,499.10 = 91,474.90/x
  3. Step 3: Cross multiply
    120,999.40x = 181,499.10 × 91,474.90
  4. Step 4: Simplify right side
    120,999.40x = 16,602,612,022.59
  5. Step 5: Solve for x
    x = 16,602,612,022.59/120,999.40
  6. Step 6: Final answer
    x = 137,212.35

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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.