Home / 112,869.80-169,173.18-90,708.20

Finding the Fourth Proportional to 112,869.80, 169,173.18 and 90,708.20

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Solution

The fourth proportional to 112,869.80, 169,173.18 and 90,708.20 is: 135,956.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,869.80 : 169,173.18 = 90,708.20 : x
  2. Step 2: Convert to fraction form
    112,869.80/169,173.18 = 90,708.20/x
  3. Step 3: Cross multiply
    112,869.80x = 169,173.18 × 90,708.20
  4. Step 4: Simplify right side
    112,869.80x = 15,345,394,646.08
  5. Step 5: Solve for x
    x = 15,345,394,646.08/112,869.80
  6. Step 6: Final answer
    x = 135,956.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.