Home / 73,018.71-109,528.29-20,428.65

Finding the Fourth Proportional to 73,018.71, 109,528.29 and 20,428.65

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Solution

The fourth proportional to 73,018.71, 109,528.29 and 20,428.65 is: 30,643.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,018.71 : 109,528.29 = 20,428.65 : x
  2. Step 2: Convert to fraction form
    73,018.71/109,528.29 = 20,428.65/x
  3. Step 3: Cross multiply
    73,018.71x = 109,528.29 × 20,428.65
  4. Step 4: Simplify right side
    73,018.71x = 2,237,515,101.51
  5. Step 5: Solve for x
    x = 2,237,515,101.51/73,018.71
  6. Step 6: Final answer
    x = 30,643.04

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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.