Home / 74,428.18-111,633.46-21,124.86

Finding the Fourth Proportional to 74,428.18, 111,633.46 and 21,124.86

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Solution

The fourth proportional to 74,428.18, 111,633.46 and 21,124.86 is: 31,684.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,428.18 : 111,633.46 = 21,124.86 : x
  2. Step 2: Convert to fraction form
    74,428.18/111,633.46 = 21,124.86/x
  3. Step 3: Cross multiply
    74,428.18x = 111,633.46 × 21,124.86
  4. Step 4: Simplify right side
    74,428.18x = 2,358,241,213.82
  5. Step 5: Solve for x
    x = 2,358,241,213.82/74,428.18
  6. Step 6: Final answer
    x = 31,684.79

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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.