Home / 135,919.55-187,583.85-77,781.67

Finding the Fourth Proportional to 135,919.55, 187,583.85 and 77,781.67

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Solution

The fourth proportional to 135,919.55, 187,583.85 and 77,781.67 is: 107,347.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,919.55 : 187,583.85 = 77,781.67 : x
  2. Step 2: Convert to fraction form
    135,919.55/187,583.85 = 77,781.67/x
  3. Step 3: Cross multiply
    135,919.55x = 187,583.85 × 77,781.67
  4. Step 4: Simplify right side
    135,919.55x = 14,590,584,649.07
  5. Step 5: Solve for x
    x = 14,590,584,649.07/135,919.55
  6. Step 6: Final answer
    x = 107,347.21

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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.