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Finding the Fourth Proportional to 219,013.70, 328,629.90 and 124,316.60

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Solution

The fourth proportional to 219,013.70, 328,629.90 and 124,316.60 is: 186,536.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,013.70 : 328,629.90 = 124,316.60 : x
  2. Step 2: Convert to fraction form
    219,013.70/328,629.90 = 124,316.60/x
  3. Step 3: Cross multiply
    219,013.70x = 328,629.90 × 124,316.60
  4. Step 4: Simplify right side
    219,013.70x = 40,854,151,826.34
  5. Step 5: Solve for x
    x = 40,854,151,826.34/219,013.70
  6. Step 6: Final answer
    x = 186,536.97

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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.