Home / 129,552.96-178,783.68-72,965.28

Finding the Fourth Proportional to 129,552.96, 178,783.68 and 72,965.28

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Solution

The fourth proportional to 129,552.96, 178,783.68 and 72,965.28 is: 100,692.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,552.96 : 178,783.68 = 72,965.28 : x
  2. Step 2: Convert to fraction form
    129,552.96/178,783.68 = 72,965.28/x
  3. Step 3: Cross multiply
    129,552.96x = 178,783.68 × 72,965.28
  4. Step 4: Simplify right side
    129,552.96x = 13,045,001,270.63
  5. Step 5: Solve for x
    x = 13,045,001,270.63/129,552.96
  6. Step 6: Final answer
    x = 100,692.42

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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.