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Finding the Fourth Proportional to 139,753.90, 192,855.20 and 76,090.42

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Solution

The fourth proportional to 139,753.90, 192,855.20 and 76,090.42 is: 105,001.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,753.90 : 192,855.20 = 76,090.42 : x
  2. Step 2: Convert to fraction form
    139,753.90/192,855.20 = 76,090.42/x
  3. Step 3: Cross multiply
    139,753.90x = 192,855.20 × 76,090.42
  4. Step 4: Simplify right side
    139,753.90x = 14,674,433,167.18
  5. Step 5: Solve for x
    x = 14,674,433,167.18/139,753.90
  6. Step 6: Final answer
    x = 105,001.96

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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.