Home / 129,351.01-178,502.61-71,990.32

Finding the Fourth Proportional to 129,351.01, 178,502.61 and 71,990.32

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Solution

The fourth proportional to 129,351.01, 178,502.61 and 71,990.32 is: 99,345.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,351.01 : 178,502.61 = 71,990.32 : x
  2. Step 2: Convert to fraction form
    129,351.01/178,502.61 = 71,990.32/x
  3. Step 3: Cross multiply
    129,351.01x = 178,502.61 × 71,990.32
  4. Step 4: Simplify right side
    129,351.01x = 12,850,459,178.09
  5. Step 5: Solve for x
    x = 12,850,459,178.09/129,351.01
  6. Step 6: Final answer
    x = 99,345.64

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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.