Home / 136,217.93-187,977.81-78,859.67

Finding the Fourth Proportional to 136,217.93, 187,977.81 and 78,859.67

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Solution

The fourth proportional to 136,217.93, 187,977.81 and 78,859.67 is: 108,824.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,217.93 : 187,977.81 = 78,859.67 : x
  2. Step 2: Convert to fraction form
    136,217.93/187,977.81 = 78,859.67/x
  3. Step 3: Cross multiply
    136,217.93x = 187,977.81 × 78,859.67
  4. Step 4: Simplify right side
    136,217.93x = 14,823,868,139.57
  5. Step 5: Solve for x
    x = 14,823,868,139.57/136,217.93
  6. Step 6: Final answer
    x = 108,824.65

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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.