Home / 99,721.35-149,457.29-49,815.38

Finding the Fourth Proportional to 99,721.35, 149,457.29 and 49,815.38

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Solution

The fourth proportional to 99,721.35, 149,457.29 and 49,815.38 is: 74,660.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,721.35 : 149,457.29 = 49,815.38 : x
  2. Step 2: Convert to fraction form
    99,721.35/149,457.29 = 49,815.38/x
  3. Step 3: Cross multiply
    99,721.35x = 149,457.29 × 49,815.38
  4. Step 4: Simplify right side
    99,721.35x = 7,445,271,819.69
  5. Step 5: Solve for x
    x = 7,445,271,819.69/99,721.35
  6. Step 6: Final answer
    x = 74,660.76

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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.