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Finding the Fourth Proportional to 139,359.76, 192,313.28 and 75,696.16

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Solution

The fourth proportional to 139,359.76, 192,313.28 and 75,696.16 is: 104,458.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,359.76 : 192,313.28 = 75,696.16 : x
  2. Step 2: Convert to fraction form
    139,359.76/192,313.28 = 75,696.16/x
  3. Step 3: Cross multiply
    139,359.76x = 192,313.28 × 75,696.16
  4. Step 4: Simplify right side
    139,359.76x = 14,557,376,813.00
  5. Step 5: Solve for x
    x = 14,557,376,813.00/139,359.76
  6. Step 6: Final answer
    x = 104,458.97

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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.