Home / 135,538.80-187,109.64-90,243.60

Finding the Fourth Proportional to 135,538.80, 187,109.64 and 90,243.60

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Solution

The fourth proportional to 135,538.80, 187,109.64 and 90,243.60 is: 124,580.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,538.80 : 187,109.64 = 90,243.60 : x
  2. Step 2: Convert to fraction form
    135,538.80/187,109.64 = 90,243.60/x
  3. Step 3: Cross multiply
    135,538.80x = 187,109.64 × 90,243.60
  4. Step 4: Simplify right side
    135,538.80x = 16,885,447,508.30
  5. Step 5: Solve for x
    x = 16,885,447,508.30/135,538.80
  6. Step 6: Final answer
    x = 124,580.18

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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.