Home / 79,979.65-119,971.50-20,818.06

Finding the Fourth Proportional to 79,979.65, 119,971.50 and 20,818.06

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Solution

The fourth proportional to 79,979.65, 119,971.50 and 20,818.06 is: 31,227.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,979.65 : 119,971.50 = 20,818.06 : x
  2. Step 2: Convert to fraction form
    79,979.65/119,971.50 = 20,818.06/x
  3. Step 3: Cross multiply
    79,979.65x = 119,971.50 × 20,818.06
  4. Step 4: Simplify right side
    79,979.65x = 2,497,573,885.29
  5. Step 5: Solve for x
    x = 2,497,573,885.29/79,979.65
  6. Step 6: Final answer
    x = 31,227.62

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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.