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Finding the Fourth Proportional to 85,114.80, 127,672.20 and 40,828.05

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Solution

The fourth proportional to 85,114.80, 127,672.20 and 40,828.05 is: 61,242.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,114.80 : 127,672.20 = 40,828.05 : x
  2. Step 2: Convert to fraction form
    85,114.80/127,672.20 = 40,828.05/x
  3. Step 3: Cross multiply
    85,114.80x = 127,672.20 × 40,828.05
  4. Step 4: Simplify right side
    85,114.80x = 5,212,606,965.21
  5. Step 5: Solve for x
    x = 5,212,606,965.21/85,114.80
  6. Step 6: Final answer
    x = 61,242.08

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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.