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Finding the Fourth Proportional to 85,647.70, 128,480.10 and 29,480.37

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Solution

The fourth proportional to 85,647.70, 128,480.10 and 29,480.37 is: 44,223.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,647.70 : 128,480.10 = 29,480.37 : x
  2. Step 2: Convert to fraction form
    85,647.70/128,480.10 = 29,480.37/x
  3. Step 3: Cross multiply
    85,647.70x = 128,480.10 × 29,480.37
  4. Step 4: Simplify right side
    85,647.70x = 3,787,641,098.90
  5. Step 5: Solve for x
    x = 3,787,641,098.90/85,647.70
  6. Step 6: Final answer
    x = 44,223.50

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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.