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Finding the Fourth Proportional to 138,809.60, 191,554.96 and 75,146.84

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Solution

The fourth proportional to 138,809.60, 191,554.96 and 75,146.84 is: 103,701.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,809.60 : 191,554.96 = 75,146.84 : x
  2. Step 2: Convert to fraction form
    138,809.60/191,554.96 = 75,146.84/x
  3. Step 3: Cross multiply
    138,809.60x = 191,554.96 × 75,146.84
  4. Step 4: Simplify right side
    138,809.60x = 14,394,749,930.33
  5. Step 5: Solve for x
    x = 14,394,749,930.33/138,809.60
  6. Step 6: Final answer
    x = 103,701.40

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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.