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Finding the Fourth Proportional to 92,561.70, 138,842.55 and 82,720.20

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Solution

The fourth proportional to 92,561.70, 138,842.55 and 82,720.20 is: 124,080.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,561.70 : 138,842.55 = 82,720.20 : x
  2. Step 2: Convert to fraction form
    92,561.70/138,842.55 = 82,720.20/x
  3. Step 3: Cross multiply
    92,561.70x = 138,842.55 × 82,720.20
  4. Step 4: Simplify right side
    92,561.70x = 11,485,083,504.51
  5. Step 5: Solve for x
    x = 11,485,083,504.51/92,561.70
  6. Step 6: Final answer
    x = 124,080.30

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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.