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Finding the Fourth Proportional to 107,704.40, 161,729.40 and 72,798.80

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Solution

The fourth proportional to 107,704.40, 161,729.40 and 72,798.80 is: 109,315.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    107,704.40 : 161,729.40 = 72,798.80 : x
  2. Step 2: Convert to fraction form
    107,704.40/161,729.40 = 72,798.80/x
  3. Step 3: Cross multiply
    107,704.40x = 161,729.40 × 72,798.80
  4. Step 4: Simplify right side
    107,704.40x = 11,773,706,244.72
  5. Step 5: Solve for x
    x = 11,773,706,244.72/107,704.40
  6. Step 6: Final answer
    x = 109,315.00

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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.