Home / 135,806.98-187,423.08-78,465.67

Finding the Fourth Proportional to 135,806.98, 187,423.08 and 78,465.67

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Solution

The fourth proportional to 135,806.98, 187,423.08 and 78,465.67 is: 108,288.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,806.98 : 187,423.08 = 78,465.67 : x
  2. Step 2: Convert to fraction form
    135,806.98/187,423.08 = 78,465.67/x
  3. Step 3: Cross multiply
    135,806.98x = 187,423.08 × 78,465.67
  4. Step 4: Simplify right side
    135,806.98x = 14,706,277,545.66
  5. Step 5: Solve for x
    x = 14,706,277,545.66/135,806.98
  6. Step 6: Final answer
    x = 108,288.08

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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.