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Finding the Fourth Proportional to 85,520.16, 128,282.16 and 29,359.84

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Solution

The fourth proportional to 85,520.16, 128,282.16 and 29,359.84 is: 44,040.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.16 : 128,282.16 = 29,359.84 : x
  2. Step 2: Convert to fraction form
    85,520.16/128,282.16 = 29,359.84/x
  3. Step 3: Cross multiply
    85,520.16x = 128,282.16 × 29,359.84
  4. Step 4: Simplify right side
    85,520.16x = 3,766,343,692.45
  5. Step 5: Solve for x
    x = 3,766,343,692.45/85,520.16
  6. Step 6: Final answer
    x = 44,040.42

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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.