Home / 129,426.12-178,559.40-75,693.96

Finding the Fourth Proportional to 129,426.12, 178,559.40 and 75,693.96

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Solution

The fourth proportional to 129,426.12, 178,559.40 and 75,693.96 is: 104,429.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,426.12 : 178,559.40 = 75,693.96 : x
  2. Step 2: Convert to fraction form
    129,426.12/178,559.40 = 75,693.96/x
  3. Step 3: Cross multiply
    129,426.12x = 178,559.40 × 75,693.96
  4. Step 4: Simplify right side
    129,426.12x = 13,515,868,081.22
  5. Step 5: Solve for x
    x = 13,515,868,081.22/129,426.12
  6. Step 6: Final answer
    x = 104,429.21

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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.