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Finding the Fourth Proportional to 65,836.44, 90,671.94 and 56,881.08

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Solution

The fourth proportional to 65,836.44, 90,671.94 and 56,881.08 is: 78,338.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,836.44 : 90,671.94 = 56,881.08 : x
  2. Step 2: Convert to fraction form
    65,836.44/90,671.94 = 56,881.08/x
  3. Step 3: Cross multiply
    65,836.44x = 90,671.94 × 56,881.08
  4. Step 4: Simplify right side
    65,836.44x = 5,157,517,872.90
  5. Step 5: Solve for x
    x = 5,157,517,872.90/65,836.44
  6. Step 6: Final answer
    x = 78,338.35

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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.