Home / 135,813.98-187,432.05-78,455.72

Finding the Fourth Proportional to 135,813.98, 187,432.05 and 78,455.72

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Solution

The fourth proportional to 135,813.98, 187,432.05 and 78,455.72 is: 108,273.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,813.98 : 187,432.05 = 78,455.72 : x
  2. Step 2: Convert to fraction form
    135,813.98/187,432.05 = 78,455.72/x
  3. Step 3: Cross multiply
    135,813.98x = 187,432.05 × 78,455.72
  4. Step 4: Simplify right side
    135,813.98x = 14,705,116,580.59
  5. Step 5: Solve for x
    x = 14,705,116,580.59/135,813.98
  6. Step 6: Final answer
    x = 108,273.95

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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.