Home / 74,108-111,128.40-31,968.20

Finding the Fourth Proportional to 74,108, 111,128.40 and 31,968.20

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Solution

The fourth proportional to 74,108, 111,128.40 and 31,968.20 is: 47,937.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,108 : 111,128.40 = 31,968.20 : x
  2. Step 2: Convert to fraction form
    74,108/111,128.40 = 31,968.20/x
  3. Step 3: Cross multiply
    74,108x = 111,128.40 × 31,968.20
  4. Step 4: Simplify right side
    74,108x = 3,552,574,916.88
  5. Step 5: Solve for x
    x = 3,552,574,916.88/74,108
  6. Step 6: Final answer
    x = 47,937.81

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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.