Home / 135,655.54-187,165.65-78,290.26

Finding the Fourth Proportional to 135,655.54, 187,165.65 and 78,290.26

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Solution

The fourth proportional to 135,655.54, 187,165.65 and 78,290.26 is: 108,018.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,655.54 : 187,165.65 = 78,290.26 : x
  2. Step 2: Convert to fraction form
    135,655.54/187,165.65 = 78,290.26/x
  3. Step 3: Cross multiply
    135,655.54x = 187,165.65 × 78,290.26
  4. Step 4: Simplify right side
    135,655.54x = 14,653,247,401.57
  5. Step 5: Solve for x
    x = 14,653,247,401.57/135,655.54
  6. Step 6: Final answer
    x = 108,018.05

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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.