Home / 91,918.71-137,878.18-28,739.17

Finding the Fourth Proportional to 91,918.71, 137,878.18 and 28,739.17

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Solution

The fourth proportional to 91,918.71, 137,878.18 and 28,739.17 is: 43,108.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,918.71 : 137,878.18 = 28,739.17 : x
  2. Step 2: Convert to fraction form
    91,918.71/137,878.18 = 28,739.17/x
  3. Step 3: Cross multiply
    91,918.71x = 137,878.18 × 28,739.17
  4. Step 4: Simplify right side
    91,918.71x = 3,962,504,454.31
  5. Step 5: Solve for x
    x = 3,962,504,454.31/91,918.71
  6. Step 6: Final answer
    x = 43,108.79

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.