Home / 78,318.27-108,079.29-42,508.28

Finding the Fourth Proportional to 78,318.27, 108,079.29 and 42,508.28

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Solution

The fourth proportional to 78,318.27, 108,079.29 and 42,508.28 is: 58,661.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,318.27 : 108,079.29 = 42,508.28 : x
  2. Step 2: Convert to fraction form
    78,318.27/108,079.29 = 42,508.28/x
  3. Step 3: Cross multiply
    78,318.27x = 108,079.29 × 42,508.28
  4. Step 4: Simplify right side
    78,318.27x = 4,594,264,181.12
  5. Step 5: Solve for x
    x = 4,594,264,181.12/78,318.27
  6. Step 6: Final answer
    x = 58,661.46

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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.