Home / 135,555.55-187,153.81-87,178.30

Finding the Fourth Proportional to 135,555.55, 187,153.81 and 87,178.30

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Solution

The fourth proportional to 135,555.55, 187,153.81 and 87,178.30 is: 120,362.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,555.55 : 187,153.81 = 87,178.30 : x
  2. Step 2: Convert to fraction form
    135,555.55/187,153.81 = 87,178.30/x
  3. Step 3: Cross multiply
    135,555.55x = 187,153.81 × 87,178.30
  4. Step 4: Simplify right side
    135,555.55x = 16,315,750,308.49
  5. Step 5: Solve for x
    x = 16,315,750,308.49/135,555.55
  6. Step 6: Final answer
    x = 120,362.10

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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.