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Finding the Fourth Proportional to 139,382.65, 192,338.58 and 75,719.08

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Solution

The fourth proportional to 139,382.65, 192,338.58 and 75,719.08 is: 104,487.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,382.65 : 192,338.58 = 75,719.08 : x
  2. Step 2: Convert to fraction form
    139,382.65/192,338.58 = 75,719.08/x
  3. Step 3: Cross multiply
    139,382.65x = 192,338.58 × 75,719.08
  4. Step 4: Simplify right side
    139,382.65x = 14,563,700,326.11
  5. Step 5: Solve for x
    x = 14,563,700,326.11/139,382.65
  6. Step 6: Final answer
    x = 104,487.18

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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.