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Finding the Fourth Proportional to 91,770.91, 137,639.93 and 58,391.82

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Solution

The fourth proportional to 91,770.91, 137,639.93 and 58,391.82 is: 87,577.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,770.91 : 137,639.93 = 58,391.82 : x
  2. Step 2: Convert to fraction form
    91,770.91/137,639.93 = 58,391.82/x
  3. Step 3: Cross multiply
    91,770.91x = 137,639.93 × 58,391.82
  4. Step 4: Simplify right side
    91,770.91x = 8,037,045,725.41
  5. Step 5: Solve for x
    x = 8,037,045,725.41/91,770.91
  6. Step 6: Final answer
    x = 87,577.27

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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.