Home / 129,693.12-178,990.26-76,023.21

Finding the Fourth Proportional to 129,693.12, 178,990.26 and 76,023.21

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Solution

The fourth proportional to 129,693.12, 178,990.26 and 76,023.21 is: 104,920.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,693.12 : 178,990.26 = 76,023.21 : x
  2. Step 2: Convert to fraction form
    129,693.12/178,990.26 = 76,023.21/x
  3. Step 3: Cross multiply
    129,693.12x = 178,990.26 × 76,023.21
  4. Step 4: Simplify right side
    129,693.12x = 13,607,414,123.93
  5. Step 5: Solve for x
    x = 13,607,414,123.93/129,693.12
  6. Step 6: Final answer
    x = 104,920.09

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1.5x scale

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.