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Finding the Fourth Proportional to 85,535.08, 128,211.90 and 32,921.80

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Solution

The fourth proportional to 85,535.08, 128,211.90 and 32,921.80 is: 49,347.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,535.08 : 128,211.90 = 32,921.80 : x
  2. Step 2: Convert to fraction form
    85,535.08/128,211.90 = 32,921.80/x
  3. Step 3: Cross multiply
    85,535.08x = 128,211.90 × 32,921.80
  4. Step 4: Simplify right side
    85,535.08x = 4,220,966,529.42
  5. Step 5: Solve for x
    x = 4,220,966,529.42/85,535.08
  6. Step 6: Final answer
    x = 49,347.78

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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.