Home / 135,530.89-187,027.58-78,172.56

Finding the Fourth Proportional to 135,530.89, 187,027.58 and 78,172.56

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Solution

The fourth proportional to 135,530.89, 187,027.58 and 78,172.56 is: 107,875.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,530.89 : 187,027.58 = 78,172.56 : x
  2. Step 2: Convert to fraction form
    135,530.89/187,027.58 = 78,172.56/x
  3. Step 3: Cross multiply
    135,530.89x = 187,027.58 × 78,172.56
  4. Step 4: Simplify right side
    135,530.89x = 14,620,424,719.20
  5. Step 5: Solve for x
    x = 14,620,424,719.20/135,530.89
  6. Step 6: Final answer
    x = 107,875.22

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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.