Home / 135,513.93-187,035.31-78,190.30

Finding the Fourth Proportional to 135,513.93, 187,035.31 and 78,190.30

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Solution

The fourth proportional to 135,513.93, 187,035.31 and 78,190.30 is: 107,917.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,513.93 : 187,035.31 = 78,190.30 : x
  2. Step 2: Convert to fraction form
    135,513.93/187,035.31 = 78,190.30/x
  3. Step 3: Cross multiply
    135,513.93x = 187,035.31 × 78,190.30
  4. Step 4: Simplify right side
    135,513.93x = 14,624,346,999.49
  5. Step 5: Solve for x
    x = 14,624,346,999.49/135,513.93
  6. Step 6: Final answer
    x = 107,917.67

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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.