Home / 135,328.77-186,771.15-81,642.78

Finding the Fourth Proportional to 135,328.77, 186,771.15 and 81,642.78

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Solution

The fourth proportional to 135,328.77, 186,771.15 and 81,642.78 is: 112,677.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,328.77 : 186,771.15 = 81,642.78 : x
  2. Step 2: Convert to fraction form
    135,328.77/186,771.15 = 81,642.78/x
  3. Step 3: Cross multiply
    135,328.77x = 186,771.15 × 81,642.78
  4. Step 4: Simplify right side
    135,328.77x = 15,248,515,909.80
  5. Step 5: Solve for x
    x = 15,248,515,909.80/135,328.77
  6. Step 6: Final answer
    x = 112,677.56

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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.