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Finding the Fourth Proportional to 74,096.40, 111,263.40 and 68,638.80

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Solution

The fourth proportional to 74,096.40, 111,263.40 and 68,638.80 is: 103,068.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,096.40 : 111,263.40 = 68,638.80 : x
  2. Step 2: Convert to fraction form
    74,096.40/111,263.40 = 68,638.80/x
  3. Step 3: Cross multiply
    74,096.40x = 111,263.40 × 68,638.80
  4. Step 4: Simplify right side
    74,096.40x = 7,636,986,259.92
  5. Step 5: Solve for x
    x = 7,636,986,259.92/74,096.40
  6. Step 6: Final answer
    x = 103,068.25

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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.