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Finding the Fourth Proportional to 85,909, 118,606.26 and 56,152.84

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Solution

The fourth proportional to 85,909, 118,606.26 and 56,152.84 is: 77,524.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,909 : 118,606.26 = 56,152.84 : x
  2. Step 2: Convert to fraction form
    85,909/118,606.26 = 56,152.84/x
  3. Step 3: Cross multiply
    85,909x = 118,606.26 × 56,152.84
  4. Step 4: Simplify right side
    85,909x = 6,660,078,340.78
  5. Step 5: Solve for x
    x = 6,660,078,340.78/85,909
  6. Step 6: Final answer
    x = 77,524.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.