Home / 145,405.60-200,660.06-81,743.92

Finding the Fourth Proportional to 145,405.60, 200,660.06 and 81,743.92

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Solution

The fourth proportional to 145,405.60, 200,660.06 and 81,743.92 is: 112,806.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,405.60 : 200,660.06 = 81,743.92 : x
  2. Step 2: Convert to fraction form
    145,405.60/200,660.06 = 81,743.92/x
  3. Step 3: Cross multiply
    145,405.60x = 200,660.06 × 81,743.92
  4. Step 4: Simplify right side
    145,405.60x = 16,402,739,891.84
  5. Step 5: Solve for x
    x = 16,402,739,891.84/145,405.60
  6. Step 6: Final answer
    x = 112,806.80

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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.