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Finding the Fourth Proportional to 85,364.40, 117,787.32 and 73,408.80

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Solution

The fourth proportional to 85,364.40, 117,787.32 and 73,408.80 is: 101,290.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,364.40 : 117,787.32 = 73,408.80 : x
  2. Step 2: Convert to fraction form
    85,364.40/117,787.32 = 73,408.80/x
  3. Step 3: Cross multiply
    85,364.40x = 117,787.32 × 73,408.80
  4. Step 4: Simplify right side
    85,364.40x = 8,646,625,816.42
  5. Step 5: Solve for x
    x = 8,646,625,816.42/85,364.40
  6. Step 6: Final answer
    x = 101,290.77

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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.