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Finding the Fourth Proportional to 138,755.42, 191,482.49 and 75,093.21

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Solution

The fourth proportional to 138,755.42, 191,482.49 and 75,093.21 is: 103,628.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,755.42 : 191,482.49 = 75,093.21 : x
  2. Step 2: Convert to fraction form
    138,755.42/191,482.49 = 75,093.21/x
  3. Step 3: Cross multiply
    138,755.42x = 191,482.49 × 75,093.21
  4. Step 4: Simplify right side
    138,755.42x = 14,379,035,347.97
  5. Step 5: Solve for x
    x = 14,379,035,347.97/138,755.42
  6. Step 6: Final answer
    x = 103,628.64

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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.