Home / 91,881.09-137,920.05-72,296.51

Finding the Fourth Proportional to 91,881.09, 137,920.05 and 72,296.51

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Solution

The fourth proportional to 91,881.09, 137,920.05 and 72,296.51 is: 108,522.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,881.09 : 137,920.05 = 72,296.51 : x
  2. Step 2: Convert to fraction form
    91,881.09/137,920.05 = 72,296.51/x
  3. Step 3: Cross multiply
    91,881.09x = 137,920.05 × 72,296.51
  4. Step 4: Simplify right side
    91,881.09x = 9,971,137,584.43
  5. Step 5: Solve for x
    x = 9,971,137,584.43/91,881.09
  6. Step 6: Final answer
    x = 108,522.20

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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.