Home / 72,687.58-109,031.06-19,379.45

Finding the Fourth Proportional to 72,687.58, 109,031.06 and 19,379.45

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Solution

The fourth proportional to 72,687.58, 109,031.06 and 19,379.45 is: 29,069.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,687.58 : 109,031.06 = 19,379.45 : x
  2. Step 2: Convert to fraction form
    72,687.58/109,031.06 = 19,379.45/x
  3. Step 3: Cross multiply
    72,687.58x = 109,031.06 × 19,379.45
  4. Step 4: Simplify right side
    72,687.58x = 2,112,962,296.74
  5. Step 5: Solve for x
    x = 2,112,962,296.74/72,687.58
  6. Step 6: Final answer
    x = 29,069.10

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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.