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Finding the Fourth Proportional to 85,704.80, 128,572.80 and 29,552.96

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Solution

The fourth proportional to 85,704.80, 128,572.80 and 29,552.96 is: 44,334.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,704.80 : 128,572.80 = 29,552.96 : x
  2. Step 2: Convert to fraction form
    85,704.80/128,572.80 = 29,552.96/x
  3. Step 3: Cross multiply
    85,704.80x = 128,572.80 × 29,552.96
  4. Step 4: Simplify right side
    85,704.80x = 3,799,706,815.49
  5. Step 5: Solve for x
    x = 3,799,706,815.49/85,704.80
  6. Step 6: Final answer
    x = 44,334.82

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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.