Home / 103,631.85-142,999.26-65,376.96

Finding the Fourth Proportional to 103,631.85, 142,999.26 and 65,376.96

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Solution

The fourth proportional to 103,631.85, 142,999.26 and 65,376.96 is: 90,212.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,631.85 : 142,999.26 = 65,376.96 : x
  2. Step 2: Convert to fraction form
    103,631.85/142,999.26 = 65,376.96/x
  3. Step 3: Cross multiply
    103,631.85x = 142,999.26 × 65,376.96
  4. Step 4: Simplify right side
    103,631.85x = 9,348,856,901.05
  5. Step 5: Solve for x
    x = 9,348,856,901.05/103,631.85
  6. Step 6: Final answer
    x = 90,212.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.