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Finding the Fourth Proportional to 85,969.80, 129,001.78 and 33,381.36

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Solution

The fourth proportional to 85,969.80, 129,001.78 and 33,381.36 is: 50,090.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,969.80 : 129,001.78 = 33,381.36 : x
  2. Step 2: Convert to fraction form
    85,969.80/129,001.78 = 33,381.36/x
  3. Step 3: Cross multiply
    85,969.80x = 129,001.78 × 33,381.36
  4. Step 4: Simplify right side
    85,969.80x = 4,306,254,858.82
  5. Step 5: Solve for x
    x = 4,306,254,858.82/85,969.80
  6. Step 6: Final answer
    x = 50,090.32

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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.