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Finding the Fourth Proportional to 85,491.80, 128,241.16 and 32,178.42

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Solution

The fourth proportional to 85,491.80, 128,241.16 and 32,178.42 is: 48,268.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,491.80 : 128,241.16 = 32,178.42 : x
  2. Step 2: Convert to fraction form
    85,491.80/128,241.16 = 32,178.42/x
  3. Step 3: Cross multiply
    85,491.80x = 128,241.16 × 32,178.42
  4. Step 4: Simplify right side
    85,491.80x = 4,126,597,907.77
  5. Step 5: Solve for x
    x = 4,126,597,907.77/85,491.80
  6. Step 6: Final answer
    x = 48,268.93

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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.