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Finding the Fourth Proportional to 120,554.64, 180,816.48 and 31,814.82

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Solution

The fourth proportional to 120,554.64, 180,816.48 and 31,814.82 is: 47,718.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,554.64 : 180,816.48 = 31,814.82 : x
  2. Step 2: Convert to fraction form
    120,554.64/180,816.48 = 31,814.82/x
  3. Step 3: Cross multiply
    120,554.64x = 180,816.48 × 31,814.82
  4. Step 4: Simplify right side
    120,554.64x = 5,752,643,764.23
  5. Step 5: Solve for x
    x = 5,752,643,764.23/120,554.64
  6. Step 6: Final answer
    x = 47,718.14

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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.