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Finding the Fourth Proportional to 139,950.80, 193,132.20 and 76,288.64

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Solution

The fourth proportional to 139,950.80, 193,132.20 and 76,288.64 is: 105,278.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,950.80 : 193,132.20 = 76,288.64 : x
  2. Step 2: Convert to fraction form
    139,950.80/193,132.20 = 76,288.64/x
  3. Step 3: Cross multiply
    139,950.80x = 193,132.20 × 76,288.64
  4. Step 4: Simplify right side
    139,950.80x = 14,733,792,878.21
  5. Step 5: Solve for x
    x = 14,733,792,878.21/139,950.80
  6. Step 6: Final answer
    x = 105,278.38

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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.