Home / 105,420.22-145,568.55-75,297.94

Finding the Fourth Proportional to 105,420.22, 145,568.55 and 75,297.94

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Solution

The fourth proportional to 105,420.22, 145,568.55 and 75,297.94 is: 103,974.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,420.22 : 145,568.55 = 75,297.94 : x
  2. Step 2: Convert to fraction form
    105,420.22/145,568.55 = 75,297.94/x
  3. Step 3: Cross multiply
    105,420.22x = 145,568.55 × 75,297.94
  4. Step 4: Simplify right side
    105,420.22x = 10,961,011,943.79
  5. Step 5: Solve for x
    x = 10,961,011,943.79/105,420.22
  6. Step 6: Final answer
    x = 103,974.47

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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.