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Finding the Fourth Proportional to 135,705.48, 187,280.82 and 79,113.48

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Solution

The fourth proportional to 135,705.48, 187,280.82 and 79,113.48 is: 109,180.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,705.48 : 187,280.82 = 79,113.48 : x
  2. Step 2: Convert to fraction form
    135,705.48/187,280.82 = 79,113.48/x
  3. Step 3: Cross multiply
    135,705.48x = 187,280.82 × 79,113.48
  4. Step 4: Simplify right side
    135,705.48x = 14,816,437,407.45
  5. Step 5: Solve for x
    x = 14,816,437,407.45/135,705.48
  6. Step 6: Final answer
    x = 109,180.83

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1.5x scale

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.