Home / 78,318.33-108,079.39-42,508.34

Finding the Fourth Proportional to 78,318.33, 108,079.39 and 42,508.34

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Solution

The fourth proportional to 78,318.33, 108,079.39 and 42,508.34 is: 58,661.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,318.33 : 108,079.39 = 42,508.34 : x
  2. Step 2: Convert to fraction form
    78,318.33/108,079.39 = 42,508.34/x
  3. Step 3: Cross multiply
    78,318.33x = 108,079.39 × 42,508.34
  4. Step 4: Simplify right side
    78,318.33x = 4,594,275,457.11
  5. Step 5: Solve for x
    x = 4,594,275,457.11/78,318.33
  6. Step 6: Final answer
    x = 58,661.56

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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.