Home / 74,339.40-111,638.70-72,006.60

Finding the Fourth Proportional to 74,339.40, 111,638.70 and 72,006.60

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Solution

The fourth proportional to 74,339.40, 111,638.70 and 72,006.60 is: 108,135.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,339.40 : 111,638.70 = 72,006.60 : x
  2. Step 2: Convert to fraction form
    74,339.40/111,638.70 = 72,006.60/x
  3. Step 3: Cross multiply
    74,339.40x = 111,638.70 × 72,006.60
  4. Step 4: Simplify right side
    74,339.40x = 8,038,723,215.42
  5. Step 5: Solve for x
    x = 8,038,723,215.42/74,339.40
  6. Step 6: Final answer
    x = 108,135.43

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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.