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Finding the Fourth Proportional to 85,241.34, 117,683.52 and 75,783.78

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Solution

The fourth proportional to 85,241.34, 117,683.52 and 75,783.78 is: 104,626.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,241.34 : 117,683.52 = 75,783.78 : x
  2. Step 2: Convert to fraction form
    85,241.34/117,683.52 = 75,783.78/x
  3. Step 3: Cross multiply
    85,241.34x = 117,683.52 × 75,783.78
  4. Step 4: Simplify right side
    85,241.34x = 8,918,501,989.31
  5. Step 5: Solve for x
    x = 8,918,501,989.31/85,241.34
  6. Step 6: Final answer
    x = 104,626.49

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1.5x scale

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.