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Finding the Fourth Proportional to 72,900.38, 108,951.14 and 53,220.38

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Solution

The fourth proportional to 72,900.38, 108,951.14 and 53,220.38 is: 79,538.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,900.38 : 108,951.14 = 53,220.38 : x
  2. Step 2: Convert to fraction form
    72,900.38/108,951.14 = 53,220.38/x
  3. Step 3: Cross multiply
    72,900.38x = 108,951.14 × 53,220.38
  4. Step 4: Simplify right side
    72,900.38x = 5,798,421,072.23
  5. Step 5: Solve for x
    x = 5,798,421,072.23/72,900.38
  6. Step 6: Final answer
    x = 79,538.97

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These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.