Home / 135,900.40-187,543.74-79,300.84

Finding the Fourth Proportional to 135,900.40, 187,543.74 and 79,300.84

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Solution

The fourth proportional to 135,900.40, 187,543.74 and 79,300.84 is: 109,435.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,900.40 : 187,543.74 = 79,300.84 : x
  2. Step 2: Convert to fraction form
    135,900.40/187,543.74 = 79,300.84/x
  3. Step 3: Cross multiply
    135,900.40x = 187,543.74 × 79,300.84
  4. Step 4: Simplify right side
    135,900.40x = 14,872,376,118.74
  5. Step 5: Solve for x
    x = 14,872,376,118.74/135,900.40
  6. Step 6: Final answer
    x = 109,435.85

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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.