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Finding the Fourth Proportional to 74,606.40, 111,909.60 and 73,828.80

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Solution

The fourth proportional to 74,606.40, 111,909.60 and 73,828.80 is: 110,743.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,606.40 : 111,909.60 = 73,828.80 : x
  2. Step 2: Convert to fraction form
    74,606.40/111,909.60 = 73,828.80/x
  3. Step 3: Cross multiply
    74,606.40x = 111,909.60 × 73,828.80
  4. Step 4: Simplify right side
    74,606.40x = 8,262,151,476.48
  5. Step 5: Solve for x
    x = 8,262,151,476.48/74,606.40
  6. Step 6: Final answer
    x = 110,743.20

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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.