Home / 135,685.72-187,231.80-75,240.28

Finding the Fourth Proportional to 135,685.72, 187,231.80 and 75,240.28

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Solution

The fourth proportional to 135,685.72, 187,231.80 and 75,240.28 is: 103,823.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,685.72 : 187,231.80 = 75,240.28 : x
  2. Step 2: Convert to fraction form
    135,685.72/187,231.80 = 75,240.28/x
  3. Step 3: Cross multiply
    135,685.72x = 187,231.80 × 75,240.28
  4. Step 4: Simplify right side
    135,685.72x = 14,087,373,056.90
  5. Step 5: Solve for x
    x = 14,087,373,056.90/135,685.72
  6. Step 6: Final answer
    x = 103,823.55

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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.