Home / 78,828.32-108,785.40-43,020.64

Finding the Fourth Proportional to 78,828.32, 108,785.40 and 43,020.64

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Solution

The fourth proportional to 78,828.32, 108,785.40 and 43,020.64 is: 59,369.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,828.32 : 108,785.40 = 43,020.64 : x
  2. Step 2: Convert to fraction form
    78,828.32/108,785.40 = 43,020.64/x
  3. Step 3: Cross multiply
    78,828.32x = 108,785.40 × 43,020.64
  4. Step 4: Simplify right side
    78,828.32x = 4,680,017,530.66
  5. Step 5: Solve for x
    x = 4,680,017,530.66/78,828.32
  6. Step 6: Final answer
    x = 59,369.75

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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.