Home / 129,637.20-178,899.30-70,021.20

Finding the Fourth Proportional to 129,637.20, 178,899.30 and 70,021.20

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Solution

The fourth proportional to 129,637.20, 178,899.30 and 70,021.20 is: 96,629.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,637.20 : 178,899.30 = 70,021.20 : x
  2. Step 2: Convert to fraction form
    129,637.20/178,899.30 = 70,021.20/x
  3. Step 3: Cross multiply
    129,637.20x = 178,899.30 × 70,021.20
  4. Step 4: Simplify right side
    129,637.20x = 12,526,743,665.16
  5. Step 5: Solve for x
    x = 12,526,743,665.16/129,637.20
  6. Step 6: Final answer
    x = 96,629.24

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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.