Home / 135,288.45-186,638.40-81,541.71

Finding the Fourth Proportional to 135,288.45, 186,638.40 and 81,541.71

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Solution

The fourth proportional to 135,288.45, 186,638.40 and 81,541.71 is: 112,491.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,288.45 : 186,638.40 = 81,541.71 : x
  2. Step 2: Convert to fraction form
    135,288.45/186,638.40 = 81,541.71/x
  3. Step 3: Cross multiply
    135,288.45x = 186,638.40 × 81,541.71
  4. Step 4: Simplify right side
    135,288.45x = 15,218,814,287.66
  5. Step 5: Solve for x
    x = 15,218,814,287.66/135,288.45
  6. Step 6: Final answer
    x = 112,491.60

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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.