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Finding the Fourth Proportional to 78,703.38, 108,609.18 and 42,893.64

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Solution

The fourth proportional to 78,703.38, 108,609.18 and 42,893.64 is: 59,192.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,703.38 : 108,609.18 = 42,893.64 : x
  2. Step 2: Convert to fraction form
    78,703.38/108,609.18 = 42,893.64/x
  3. Step 3: Cross multiply
    78,703.38x = 108,609.18 × 42,893.64
  4. Step 4: Simplify right side
    78,703.38x = 4,658,643,067.62
  5. Step 5: Solve for x
    x = 4,658,643,067.62/78,703.38
  6. Step 6: Final answer
    x = 59,192.41

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1.5x scale

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.