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Finding the Fourth Proportional to 89,845.80, 134,749.80 and 45,430.80

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Solution

The fourth proportional to 89,845.80, 134,749.80 and 45,430.80 is: 68,136.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,845.80 : 134,749.80 = 45,430.80 : x
  2. Step 2: Convert to fraction form
    89,845.80/134,749.80 = 45,430.80/x
  3. Step 3: Cross multiply
    89,845.80x = 134,749.80 × 45,430.80
  4. Step 4: Simplify right side
    89,845.80x = 6,121,791,213.84
  5. Step 5: Solve for x
    x = 6,121,791,213.84/89,845.80
  6. Step 6: Final answer
    x = 68,136.64

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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.