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Finding the Fourth Proportional to 140,315.40, 193,634.40 and 76,652.64

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Solution

The fourth proportional to 140,315.40, 193,634.40 and 76,652.64 is: 105,780.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,315.40 : 193,634.40 = 76,652.64 : x
  2. Step 2: Convert to fraction form
    140,315.40/193,634.40 = 76,652.64/x
  3. Step 3: Cross multiply
    140,315.40x = 193,634.40 × 76,652.64
  4. Step 4: Simplify right side
    140,315.40x = 14,842,587,954.82
  5. Step 5: Solve for x
    x = 14,842,587,954.82/140,315.40
  6. Step 6: Final answer
    x = 105,780.18

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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.