Home / 135,731.42-187,325.54-78,384.74

Finding the Fourth Proportional to 135,731.42, 187,325.54 and 78,384.74

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Solution

The fourth proportional to 135,731.42, 187,325.54 and 78,384.74 is: 108,180.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,731.42 : 187,325.54 = 78,384.74 : x
  2. Step 2: Convert to fraction form
    135,731.42/187,325.54 = 78,384.74/x
  3. Step 3: Cross multiply
    135,731.42x = 187,325.54 × 78,384.74
  4. Step 4: Simplify right side
    135,731.42x = 14,683,463,748.26
  5. Step 5: Solve for x
    x = 14,683,463,748.26/135,731.42
  6. Step 6: Final answer
    x = 108,180.29

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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.