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Finding the Fourth Proportional to 85,943.70, 128,884.70 and 29,768.72

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Solution

The fourth proportional to 85,943.70, 128,884.70 and 29,768.72 is: 44,642.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,943.70 : 128,884.70 = 29,768.72 : x
  2. Step 2: Convert to fraction form
    85,943.70/128,884.70 = 29,768.72/x
  3. Step 3: Cross multiply
    85,943.70x = 128,884.70 × 29,768.72
  4. Step 4: Simplify right side
    85,943.70x = 3,836,731,976.58
  5. Step 5: Solve for x
    x = 3,836,731,976.58/85,943.70
  6. Step 6: Final answer
    x = 44,642.39

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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.