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Finding the Fourth Proportional to 72,243.90, 108,370.10 and 27,870.89

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Solution

The fourth proportional to 72,243.90, 108,370.10 and 27,870.89 is: 41,807.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,243.90 : 108,370.10 = 27,870.89 : x
  2. Step 2: Convert to fraction form
    72,243.90/108,370.10 = 27,870.89/x
  3. Step 3: Cross multiply
    72,243.90x = 108,370.10 × 27,870.89
  4. Step 4: Simplify right side
    72,243.90x = 3,020,370,664.22
  5. Step 5: Solve for x
    x = 3,020,370,664.22/72,243.90
  6. Step 6: Final answer
    x = 41,807.97

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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.