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Finding the Fourth Proportional to 85,065.80, 117,389.66 and 47,340.05

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Solution

The fourth proportional to 85,065.80, 117,389.66 and 47,340.05 is: 65,328.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,065.80 : 117,389.66 = 47,340.05 : x
  2. Step 2: Convert to fraction form
    85,065.80/117,389.66 = 47,340.05/x
  3. Step 3: Cross multiply
    85,065.80x = 117,389.66 × 47,340.05
  4. Step 4: Simplify right side
    85,065.80x = 5,557,231,550.23
  5. Step 5: Solve for x
    x = 5,557,231,550.23/85,065.80
  6. Step 6: Final answer
    x = 65,328.63

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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.