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Finding the Fourth Proportional to 145,458.99, 200,734.62 and 81,796.23

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Solution

The fourth proportional to 145,458.99, 200,734.62 and 81,796.23 is: 112,879.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,458.99 : 200,734.62 = 81,796.23 : x
  2. Step 2: Convert to fraction form
    145,458.99/200,734.62 = 81,796.23/x
  3. Step 3: Cross multiply
    145,458.99x = 200,734.62 × 81,796.23
  4. Step 4: Simplify right side
    145,458.99x = 16,419,335,146.48
  5. Step 5: Solve for x
    x = 16,419,335,146.48/145,458.99
  6. Step 6: Final answer
    x = 112,879.48

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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.