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Finding the Fourth Proportional to 139,637.27, 192,703.56 and 75,979.19

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Solution

The fourth proportional to 139,637.27, 192,703.56 and 75,979.19 is: 104,853.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,637.27 : 192,703.56 = 75,979.19 : x
  2. Step 2: Convert to fraction form
    139,637.27/192,703.56 = 75,979.19/x
  3. Step 3: Cross multiply
    139,637.27x = 192,703.56 × 75,979.19
  4. Step 4: Simplify right side
    139,637.27x = 14,641,460,398.92
  5. Step 5: Solve for x
    x = 14,641,460,398.92/139,637.27
  6. Step 6: Final answer
    x = 104,853.53

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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.