Home / 102,731.09-154,145.50-71,189.69

Finding the Fourth Proportional to 102,731.09, 154,145.50 and 71,189.69

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Solution

The fourth proportional to 102,731.09, 154,145.50 and 71,189.69 is: 106,818.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,731.09 : 154,145.50 = 71,189.69 : x
  2. Step 2: Convert to fraction form
    102,731.09/154,145.50 = 71,189.69/x
  3. Step 3: Cross multiply
    102,731.09x = 154,145.50 × 71,189.69
  4. Step 4: Simplify right side
    102,731.09x = 10,973,569,411.19
  5. Step 5: Solve for x
    x = 10,973,569,411.19/102,731.09
  6. Step 6: Final answer
    x = 106,818.39

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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.