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Finding the Fourth Proportional to 91,720.96, 137,581.44 and 73,369.60

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Solution

The fourth proportional to 91,720.96, 137,581.44 and 73,369.60 is: 110,054.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,720.96 : 137,581.44 = 73,369.60 : x
  2. Step 2: Convert to fraction form
    91,720.96/137,581.44 = 73,369.60/x
  3. Step 3: Cross multiply
    91,720.96x = 137,581.44 × 73,369.60
  4. Step 4: Simplify right side
    91,720.96x = 10,094,295,220.22
  5. Step 5: Solve for x
    x = 10,094,295,220.22/91,720.96
  6. Step 6: Final answer
    x = 110,054.40

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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.