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Finding the Fourth Proportional to 123,847.80, 170,937.18 and 81,410.28

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Solution

The fourth proportional to 123,847.80, 170,937.18 and 81,410.28 is: 112,364.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,847.80 : 170,937.18 = 81,410.28 : x
  2. Step 2: Convert to fraction form
    123,847.80/170,937.18 = 81,410.28/x
  3. Step 3: Cross multiply
    123,847.80x = 170,937.18 × 81,410.28
  4. Step 4: Simplify right side
    123,847.80x = 13,916,043,686.21
  5. Step 5: Solve for x
    x = 13,916,043,686.21/123,847.80
  6. Step 6: Final answer
    x = 112,364.08

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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.