Home / 105,120.90-145,065.66-57,373.86

Finding the Fourth Proportional to 105,120.90, 145,065.66 and 57,373.86

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Solution

The fourth proportional to 105,120.90, 145,065.66 and 57,373.86 is: 79,175.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,120.90 : 145,065.66 = 57,373.86 : x
  2. Step 2: Convert to fraction form
    105,120.90/145,065.66 = 57,373.86/x
  3. Step 3: Cross multiply
    105,120.90x = 145,065.66 × 57,373.86
  4. Step 4: Simplify right side
    105,120.90x = 8,322,976,867.65
  5. Step 5: Solve for x
    x = 8,322,976,867.65/105,120.90
  6. Step 6: Final answer
    x = 79,175.28

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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.