Home / 75,140.89-103,693.69-40,685.46

Finding the Fourth Proportional to 75,140.89, 103,693.69 and 40,685.46

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Solution

The fourth proportional to 75,140.89, 103,693.69 and 40,685.46 is: 56,145.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    75,140.89 : 103,693.69 = 40,685.46 : x
  2. Step 2: Convert to fraction form
    75,140.89/103,693.69 = 40,685.46/x
  3. Step 3: Cross multiply
    75,140.89x = 103,693.69 × 40,685.46
  4. Step 4: Simplify right side
    75,140.89x = 4,218,825,476.75
  5. Step 5: Solve for x
    x = 4,218,825,476.75/75,140.89
  6. Step 6: Final answer
    x = 56,145.54

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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.