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Finding the Fourth Proportional to 91,955.88, 137,129.11 and 91,115.08

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Solution

The fourth proportional to 91,955.88, 137,129.11 and 91,115.08 is: 135,875.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,955.88 : 137,129.11 = 91,115.08 : x
  2. Step 2: Convert to fraction form
    91,955.88/137,129.11 = 91,115.08/x
  3. Step 3: Cross multiply
    91,955.88x = 137,129.11 × 91,115.08
  4. Step 4: Simplify right side
    91,955.88x = 12,494,529,827.98
  5. Step 5: Solve for x
    x = 12,494,529,827.98/91,955.88
  6. Step 6: Final answer
    x = 135,875.27

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.