Home / 135,431.32-186,905.82-78,089.08

Finding the Fourth Proportional to 135,431.32, 186,905.82 and 78,089.08

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Solution

The fourth proportional to 135,431.32, 186,905.82 and 78,089.08 is: 107,769.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,431.32 : 186,905.82 = 78,089.08 : x
  2. Step 2: Convert to fraction form
    135,431.32/186,905.82 = 78,089.08/x
  3. Step 3: Cross multiply
    135,431.32x = 186,905.82 × 78,089.08
  4. Step 4: Simplify right side
    135,431.32x = 14,595,303,530.45
  5. Step 5: Solve for x
    x = 14,595,303,530.45/135,431.32
  6. Step 6: Final answer
    x = 107,769.04

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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.