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Finding the Fourth Proportional to 78,863.76, 108,833.63 and 43,055.28

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Solution

The fourth proportional to 78,863.76, 108,833.63 and 43,055.28 is: 59,417.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,863.76 : 108,833.63 = 43,055.28 : x
  2. Step 2: Convert to fraction form
    78,863.76/108,833.63 = 43,055.28/x
  3. Step 3: Cross multiply
    78,863.76x = 108,833.63 × 43,055.28
  4. Step 4: Simplify right side
    78,863.76x = 4,685,862,520.70
  5. Step 5: Solve for x
    x = 4,685,862,520.70/78,863.76
  6. Step 6: Final answer
    x = 59,417.18

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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.