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Finding the Fourth Proportional to 76,561.89, 114,742.89 and 39,090.27

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Solution

The fourth proportional to 76,561.89, 114,742.89 and 39,090.27 is: 58,584.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,561.89 : 114,742.89 = 39,090.27 : x
  2. Step 2: Convert to fraction form
    76,561.89/114,742.89 = 39,090.27/x
  3. Step 3: Cross multiply
    76,561.89x = 114,742.89 × 39,090.27
  4. Step 4: Simplify right side
    76,561.89x = 4,485,330,980.97
  5. Step 5: Solve for x
    x = 4,485,330,980.97/76,561.89
  6. Step 6: Final answer
    x = 58,584.38

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1.5x scale

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.