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Finding the Fourth Proportional to 135,808.29, 187,411.86 and 75,378.78

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Solution

The fourth proportional to 135,808.29, 187,411.86 and 75,378.78 is: 104,020.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,808.29 : 187,411.86 = 75,378.78 : x
  2. Step 2: Convert to fraction form
    135,808.29/187,411.86 = 75,378.78/x
  3. Step 3: Cross multiply
    135,808.29x = 187,411.86 × 75,378.78
  4. Step 4: Simplify right side
    135,808.29x = 14,126,877,364.33
  5. Step 5: Solve for x
    x = 14,126,877,364.33/135,808.29
  6. Step 6: Final answer
    x = 104,020.73

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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.