Home / 129,402.20-178,539.18-77,705.96

Finding the Fourth Proportional to 129,402.20, 178,539.18 and 77,705.96

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Solution

The fourth proportional to 129,402.20, 178,539.18 and 77,705.96 is: 107,212.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,402.20 : 178,539.18 = 77,705.96 : x
  2. Step 2: Convert to fraction form
    129,402.20/178,539.18 = 77,705.96/x
  3. Step 3: Cross multiply
    129,402.20x = 178,539.18 × 77,705.96
  4. Step 4: Simplify right side
    129,402.20x = 13,873,558,379.51
  5. Step 5: Solve for x
    x = 13,873,558,379.51/129,402.20
  6. Step 6: Final answer
    x = 107,212.69

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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.