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Finding the Fourth Proportional to 134,906.68, 186,142.32 and 78,287.68

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Solution

The fourth proportional to 134,906.68, 186,142.32 and 78,287.68 is: 108,020.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,906.68 : 186,142.32 = 78,287.68 : x
  2. Step 2: Convert to fraction form
    134,906.68/186,142.32 = 78,287.68/x
  3. Step 3: Cross multiply
    134,906.68x = 186,142.32 × 78,287.68
  4. Step 4: Simplify right side
    134,906.68x = 14,572,650,382.62
  5. Step 5: Solve for x
    x = 14,572,650,382.62/134,906.68
  6. Step 6: Final answer
    x = 108,020.23

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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.