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Finding the Fourth Proportional to 85,861.78, 118,493.28 and 53,615.48

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Solution

The fourth proportional to 85,861.78, 118,493.28 and 53,615.48 is: 73,991.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,861.78 : 118,493.28 = 53,615.48 : x
  2. Step 2: Convert to fraction form
    85,861.78/118,493.28 = 53,615.48/x
  3. Step 3: Cross multiply
    85,861.78x = 118,493.28 × 53,615.48
  4. Step 4: Simplify right side
    85,861.78x = 6,353,073,491.51
  5. Step 5: Solve for x
    x = 6,353,073,491.51/85,861.78
  6. Step 6: Final answer
    x = 73,991.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.