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Finding the Fourth Proportional to 85,489.74, 118,008.77 and 76,521.42

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Solution

The fourth proportional to 85,489.74, 118,008.77 and 76,521.42 is: 105,629.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,489.74 : 118,008.77 = 76,521.42 : x
  2. Step 2: Convert to fraction form
    85,489.74/118,008.77 = 76,521.42/x
  3. Step 3: Cross multiply
    85,489.74x = 118,008.77 × 76,521.42
  4. Step 4: Simplify right side
    85,489.74x = 9,030,198,270.25
  5. Step 5: Solve for x
    x = 9,030,198,270.25/85,489.74
  6. Step 6: Final answer
    x = 105,629.03

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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.