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Finding the Fourth Proportional to 85,387.06, 117,834.04 and 47,661.31

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Solution

The fourth proportional to 85,387.06, 117,834.04 and 47,661.31 is: 65,772.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,387.06 : 117,834.04 = 47,661.31 : x
  2. Step 2: Convert to fraction form
    85,387.06/117,834.04 = 47,661.31/x
  3. Step 3: Cross multiply
    85,387.06x = 117,834.04 × 47,661.31
  4. Step 4: Simplify right side
    85,387.06x = 5,616,124,915.86
  5. Step 5: Solve for x
    x = 5,616,124,915.86/85,387.06
  6. Step 6: Final answer
    x = 65,772.55

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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.