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Finding the Fourth Proportional to 112,871.80, 169,176.18 and 90,710.20

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Solution

The fourth proportional to 112,871.80, 169,176.18 and 90,710.20 is: 135,959.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,871.80 : 169,176.18 = 90,710.20 : x
  2. Step 2: Convert to fraction form
    112,871.80/169,176.18 = 90,710.20/x
  3. Step 3: Cross multiply
    112,871.80x = 169,176.18 × 90,710.20
  4. Step 4: Simplify right side
    112,871.80x = 15,346,005,123.04
  5. Step 5: Solve for x
    x = 15,346,005,123.04/112,871.80
  6. Step 6: Final answer
    x = 135,959.60

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