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Finding the Fourth Proportional to 120,672.64, 181,069.20 and 54,160.32

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Solution

The fourth proportional to 120,672.64, 181,069.20 and 54,160.32 is: 81,267.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,672.64 : 181,069.20 = 54,160.32 : x
  2. Step 2: Convert to fraction form
    120,672.64/181,069.20 = 54,160.32/x
  3. Step 3: Cross multiply
    120,672.64x = 181,069.20 × 54,160.32
  4. Step 4: Simplify right side
    120,672.64x = 9,806,765,814.14
  5. Step 5: Solve for x
    x = 9,806,765,814.14/120,672.64
  6. Step 6: Final answer
    x = 81,267.52

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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.