Home / 135,074.79-186,426.36-78,518.97

Finding the Fourth Proportional to 135,074.79, 186,426.36 and 78,518.97

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Solution

The fourth proportional to 135,074.79, 186,426.36 and 78,518.97 is: 108,369.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,074.79 : 186,426.36 = 78,518.97 : x
  2. Step 2: Convert to fraction form
    135,074.79/186,426.36 = 78,518.97/x
  3. Step 3: Cross multiply
    135,074.79x = 186,426.36 × 78,518.97
  4. Step 4: Simplify right side
    135,074.79x = 14,638,005,768.05
  5. Step 5: Solve for x
    x = 14,638,005,768.05/135,074.79
  6. Step 6: Final answer
    x = 108,369.64

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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.