Home / 135,565.82-187,038.06-78,197.43

Finding the Fourth Proportional to 135,565.82, 187,038.06 and 78,197.43

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Solution

The fourth proportional to 135,565.82, 187,038.06 and 78,197.43 is: 107,887.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,565.82 : 187,038.06 = 78,197.43 : x
  2. Step 2: Convert to fraction form
    135,565.82/187,038.06 = 78,197.43/x
  3. Step 3: Cross multiply
    135,565.82x = 187,038.06 × 78,197.43
  4. Step 4: Simplify right side
    135,565.82x = 14,625,895,604.19
  5. Step 5: Solve for x
    x = 14,625,895,604.19/135,565.82
  6. Step 6: Final answer
    x = 107,887.79

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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.