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Finding the Fourth Proportional to 139,998.46, 193,193.67 and 76,337.50

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Solution

The fourth proportional to 139,998.46, 193,193.67 and 76,337.50 is: 105,343.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,998.46 : 193,193.67 = 76,337.50 : x
  2. Step 2: Convert to fraction form
    139,998.46/193,193.67 = 76,337.50/x
  3. Step 3: Cross multiply
    139,998.46x = 193,193.67 × 76,337.50
  4. Step 4: Simplify right side
    139,998.46x = 14,747,921,783.63
  5. Step 5: Solve for x
    x = 14,747,921,783.63/139,998.46
  6. Step 6: Final answer
    x = 105,343.46

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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.