Home / 75,140.71-103,694.31-40,685.81

Finding the Fourth Proportional to 75,140.71, 103,694.31 and 40,685.81

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Solution

The fourth proportional to 75,140.71, 103,694.31 and 40,685.81 is: 56,146.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,140.71 : 103,694.31 = 40,685.81 : x
  2. Step 2: Convert to fraction form
    75,140.71/103,694.31 = 40,685.81/x
  3. Step 3: Cross multiply
    75,140.71x = 103,694.31 × 40,685.81
  4. Step 4: Simplify right side
    75,140.71x = 4,218,886,476.27
  5. Step 5: Solve for x
    x = 4,218,886,476.27/75,140.71
  6. Step 6: Final answer
    x = 56,146.48

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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.