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Finding the Fourth Proportional to 105,699.35, 158,549.03 and 91,425.41

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Solution

The fourth proportional to 105,699.35, 158,549.03 and 91,425.41 is: 137,138.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,699.35 : 158,549.03 = 91,425.41 : x
  2. Step 2: Convert to fraction form
    105,699.35/158,549.03 = 91,425.41/x
  3. Step 3: Cross multiply
    105,699.35x = 158,549.03 × 91,425.41
  4. Step 4: Simplify right side
    105,699.35x = 14,495,409,760.38
  5. Step 5: Solve for x
    x = 14,495,409,760.38/105,699.35
  6. Step 6: Final answer
    x = 137,138.11

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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.