Home / 100,548.24-138,678.84-73,680.72

Finding the Fourth Proportional to 100,548.24, 138,678.84 and 73,680.72

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Solution

The fourth proportional to 100,548.24, 138,678.84 and 73,680.72 is: 101,622.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,548.24 : 138,678.84 = 73,680.72 : x
  2. Step 2: Convert to fraction form
    100,548.24/138,678.84 = 73,680.72/x
  3. Step 3: Cross multiply
    100,548.24x = 138,678.84 × 73,680.72
  4. Step 4: Simplify right side
    100,548.24x = 10,217,956,779.96
  5. Step 5: Solve for x
    x = 10,217,956,779.96/100,548.24
  6. Step 6: Final answer
    x = 101,622.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.