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Finding the Fourth Proportional to 91,920.71, 137,881.17 and 28,741.17

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Solution

The fourth proportional to 91,920.71, 137,881.17 and 28,741.17 is: 43,111.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,920.71 : 137,881.17 = 28,741.17 : x
  2. Step 2: Convert to fraction form
    91,920.71/137,881.17 = 28,741.17/x
  3. Step 3: Cross multiply
    91,920.71x = 137,881.17 × 28,741.17
  4. Step 4: Simplify right side
    91,920.71x = 3,962,866,146.77
  5. Step 5: Solve for x
    x = 3,962,866,146.77/91,920.71
  6. Step 6: Final answer
    x = 43,111.79

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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.