Home / 135,855.12-187,472.75-75,421.87

Finding the Fourth Proportional to 135,855.12, 187,472.75 and 75,421.87

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Solution

The fourth proportional to 135,855.12, 187,472.75 and 75,421.87 is: 104,078.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,855.12 : 187,472.75 = 75,421.87 : x
  2. Step 2: Convert to fraction form
    135,855.12/187,472.75 = 75,421.87/x
  3. Step 3: Cross multiply
    135,855.12x = 187,472.75 × 75,421.87
  4. Step 4: Simplify right side
    135,855.12x = 14,139,545,642.34
  5. Step 5: Solve for x
    x = 14,139,545,642.34/135,855.12
  6. Step 6: Final answer
    x = 104,078.12

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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.