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Finding the Fourth Proportional to 85,086, 117,398.58 and 71,525.58

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Solution

The fourth proportional to 85,086, 117,398.58 and 71,525.58 is: 98,688.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,086 : 117,398.58 = 71,525.58 : x
  2. Step 2: Convert to fraction form
    85,086/117,398.58 = 71,525.58/x
  3. Step 3: Cross multiply
    85,086x = 117,398.58 × 71,525.58
  4. Step 4: Simplify right side
    85,086x = 8,397,001,525.68
  5. Step 5: Solve for x
    x = 8,397,001,525.68/85,086
  6. Step 6: Final answer
    x = 98,688.40

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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.