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Finding the Fourth Proportional to 85,911.79, 118,558.91 and 47,671.49

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Solution

The fourth proportional to 85,911.79, 118,558.91 and 47,671.49 is: 65,787.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,911.79 : 118,558.91 = 47,671.49 : x
  2. Step 2: Convert to fraction form
    85,911.79/118,558.91 = 47,671.49/x
  3. Step 3: Cross multiply
    85,911.79x = 118,558.91 × 47,671.49
  4. Step 4: Simplify right side
    85,911.79x = 5,651,879,892.48
  5. Step 5: Solve for x
    x = 5,651,879,892.48/85,911.79
  6. Step 6: Final answer
    x = 65,787.01

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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.