Home / 139,381.02-192,350.70-78,953.40

Finding the Fourth Proportional to 139,381.02, 192,350.70 and 78,953.40

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Solution

The fourth proportional to 139,381.02, 192,350.70 and 78,953.40 is: 108,958.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,381.02 : 192,350.70 = 78,953.40 : x
  2. Step 2: Convert to fraction form
    139,381.02/192,350.70 = 78,953.40/x
  3. Step 3: Cross multiply
    139,381.02x = 192,350.70 × 78,953.40
  4. Step 4: Simplify right side
    139,381.02x = 15,186,741,757.38
  5. Step 5: Solve for x
    x = 15,186,741,757.38/139,381.02
  6. Step 6: Final answer
    x = 108,958.46

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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.