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Finding the Fourth Proportional to 139,324.68, 192,268.04 and 78,895.32

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Solution

The fourth proportional to 139,324.68, 192,268.04 and 78,895.32 is: 108,875.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,324.68 : 192,268.04 = 78,895.32 : x
  2. Step 2: Convert to fraction form
    139,324.68/192,268.04 = 78,895.32/x
  3. Step 3: Cross multiply
    139,324.68x = 192,268.04 × 78,895.32
  4. Step 4: Simplify right side
    139,324.68x = 15,169,048,541.57
  5. Step 5: Solve for x
    x = 15,169,048,541.57/139,324.68
  6. Step 6: Final answer
    x = 108,875.53

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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.