Home / 135,517.95-187,009.72-78,159.67

Finding the Fourth Proportional to 135,517.95, 187,009.72 and 78,159.67

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Solution

The fourth proportional to 135,517.95, 187,009.72 and 78,159.67 is: 107,857.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,517.95 : 187,009.72 = 78,159.67 : x
  2. Step 2: Convert to fraction form
    135,517.95/187,009.72 = 78,159.67/x
  3. Step 3: Cross multiply
    135,517.95x = 187,009.72 × 78,159.67
  4. Step 4: Simplify right side
    135,517.95x = 14,616,618,001.99
  5. Step 5: Solve for x
    x = 14,616,618,001.99/135,517.95
  6. Step 6: Final answer
    x = 107,857.43

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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.