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Finding the Fourth Proportional to 105,311.40, 157,736.70 and 63,685.80

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Solution

The fourth proportional to 105,311.40, 157,736.70 and 63,685.80 is: 95,389.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,311.40 : 157,736.70 = 63,685.80 : x
  2. Step 2: Convert to fraction form
    105,311.40/157,736.70 = 63,685.80/x
  3. Step 3: Cross multiply
    105,311.40x = 157,736.70 × 63,685.80
  4. Step 4: Simplify right side
    105,311.40x = 10,045,587,928.86
  5. Step 5: Solve for x
    x = 10,045,587,928.86/105,311.40
  6. Step 6: Final answer
    x = 95,389.37

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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.