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Finding the Fourth Proportional to 78,870.90, 108,844.42 and 43,063.64

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Solution

The fourth proportional to 78,870.90, 108,844.42 and 43,063.64 is: 59,429.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,870.90 : 108,844.42 = 43,063.64 : x
  2. Step 2: Convert to fraction form
    78,870.90/108,844.42 = 43,063.64/x
  3. Step 3: Cross multiply
    78,870.90x = 108,844.42 × 43,063.64
  4. Step 4: Simplify right side
    78,870.90x = 4,687,236,918.89
  5. Step 5: Solve for x
    x = 4,687,236,918.89/78,870.90
  6. Step 6: Final answer
    x = 59,429.23

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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.