Home / 135,355.20-186,744.96-78,754.56

Finding the Fourth Proportional to 135,355.20, 186,744.96 and 78,754.56

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Solution

The fourth proportional to 135,355.20, 186,744.96 and 78,754.56 is: 108,654.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,355.20 : 186,744.96 = 78,754.56 : x
  2. Step 2: Convert to fraction form
    135,355.20/186,744.96 = 78,754.56/x
  3. Step 3: Cross multiply
    135,355.20x = 186,744.96 × 78,754.56
  4. Step 4: Simplify right side
    135,355.20x = 14,707,017,157.02
  5. Step 5: Solve for x
    x = 14,707,017,157.02/135,355.20
  6. Step 6: Final answer
    x = 108,654.98

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1.5x scale

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.