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Finding the Fourth Proportional to 85,906.98, 128,855.34 and 51,068.34

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Solution

The fourth proportional to 85,906.98, 128,855.34 and 51,068.34 is: 76,599.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,906.98 : 128,855.34 = 51,068.34 : x
  2. Step 2: Convert to fraction form
    85,906.98/128,855.34 = 51,068.34/x
  3. Step 3: Cross multiply
    85,906.98x = 128,855.34 × 51,068.34
  4. Step 4: Simplify right side
    85,906.98x = 6,580,428,313.94
  5. Step 5: Solve for x
    x = 6,580,428,313.94/85,906.98
  6. Step 6: Final answer
    x = 76,599.46

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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.