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Finding the Fourth Proportional to 86,082.55, 118,808.02 and 71,719.60

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Solution

The fourth proportional to 86,082.55, 118,808.02 and 71,719.60 is: 98,984.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,082.55 : 118,808.02 = 71,719.60 : x
  2. Step 2: Convert to fraction form
    86,082.55/118,808.02 = 71,719.60/x
  3. Step 3: Cross multiply
    86,082.55x = 118,808.02 × 71,719.60
  4. Step 4: Simplify right side
    86,082.55x = 8,520,863,617.31
  5. Step 5: Solve for x
    x = 8,520,863,617.31/86,082.55
  6. Step 6: Final answer
    x = 98,984.80

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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.