Home / 135,984.45-187,647.57-78,627.45

Finding the Fourth Proportional to 135,984.45, 187,647.57 and 78,627.45

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Solution

The fourth proportional to 135,984.45, 187,647.57 and 78,627.45 is: 108,499.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,984.45 : 187,647.57 = 78,627.45 : x
  2. Step 2: Convert to fraction form
    135,984.45/187,647.57 = 78,627.45/x
  3. Step 3: Cross multiply
    135,984.45x = 187,647.57 × 78,627.45
  4. Step 4: Simplify right side
    135,984.45x = 14,754,249,927.80
  5. Step 5: Solve for x
    x = 14,754,249,927.80/135,984.45
  6. Step 6: Final answer
    x = 108,499.54

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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.