Home / 135,821.13-187,411.24-78,451.34

Finding the Fourth Proportional to 135,821.13, 187,411.24 and 78,451.34

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Solution

The fourth proportional to 135,821.13, 187,411.24 and 78,451.34 is: 108,250.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,821.13 : 187,411.24 = 78,451.34 : x
  2. Step 2: Convert to fraction form
    135,821.13/187,411.24 = 78,451.34/x
  3. Step 3: Cross multiply
    135,821.13x = 187,411.24 × 78,451.34
  4. Step 4: Simplify right side
    135,821.13x = 14,702,662,290.71
  5. Step 5: Solve for x
    x = 14,702,662,290.71/135,821.13
  6. Step 6: Final answer
    x = 108,250.18

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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.