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Finding the Fourth Proportional to 85,838, 128,606.86 and 59,559.44

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Solution

The fourth proportional to 85,838, 128,606.86 and 59,559.44 is: 89,234.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,838 : 128,606.86 = 59,559.44 : x
  2. Step 2: Convert to fraction form
    85,838/128,606.86 = 59,559.44/x
  3. Step 3: Cross multiply
    85,838x = 128,606.86 × 59,559.44
  4. Step 4: Simplify right side
    85,838x = 7,659,752,561.76
  5. Step 5: Solve for x
    x = 7,659,752,561.76/85,838
  6. Step 6: Final answer
    x = 89,234.98

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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.