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Finding the Fourth Proportional to 135,673.56, 187,066.80 and 87,909.48

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Solution

The fourth proportional to 135,673.56, 187,066.80 and 87,909.48 is: 121,209.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,673.56 : 187,066.80 = 87,909.48 : x
  2. Step 2: Convert to fraction form
    135,673.56/187,066.80 = 87,909.48/x
  3. Step 3: Cross multiply
    135,673.56x = 187,066.80 × 87,909.48
  4. Step 4: Simplify right side
    135,673.56x = 16,444,945,113.26
  5. Step 5: Solve for x
    x = 16,444,945,113.26/135,673.56
  6. Step 6: Final answer
    x = 121,209.65

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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.