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Finding the Fourth Proportional to 78,973.01, 108,708.12 and 68,883.87

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Solution

The fourth proportional to 78,973.01, 108,708.12 and 68,883.87 is: 94,820.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,973.01 : 108,708.12 = 68,883.87 : x
  2. Step 2: Convert to fraction form
    78,973.01/108,708.12 = 68,883.87/x
  3. Step 3: Cross multiply
    78,973.01x = 108,708.12 × 68,883.87
  4. Step 4: Simplify right side
    78,973.01x = 7,488,236,006.02
  5. Step 5: Solve for x
    x = 7,488,236,006.02/78,973.01
  6. Step 6: Final answer
    x = 94,820.19

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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.