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Finding the Fourth Proportional to 85,403.75, 128,105.30 and 32,776.35

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Solution

The fourth proportional to 85,403.75, 128,105.30 and 32,776.35 is: 49,164.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,403.75 : 128,105.30 = 32,776.35 : x
  2. Step 2: Convert to fraction form
    85,403.75/128,105.30 = 32,776.35/x
  3. Step 3: Cross multiply
    85,403.75x = 128,105.30 × 32,776.35
  4. Step 4: Simplify right side
    85,403.75x = 4,198,823,985.77
  5. Step 5: Solve for x
    x = 4,198,823,985.77/85,403.75
  6. Step 6: Final answer
    x = 49,164.40

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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.