Home / 78,965.40-108,972.30-43,155.42

Finding the Fourth Proportional to 78,965.40, 108,972.30 and 43,155.42

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Solution

The fourth proportional to 78,965.40, 108,972.30 and 43,155.42 is: 59,554.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,965.40 : 108,972.30 = 43,155.42 : x
  2. Step 2: Convert to fraction form
    78,965.40/108,972.30 = 43,155.42/x
  3. Step 3: Cross multiply
    78,965.40x = 108,972.30 × 43,155.42
  4. Step 4: Simplify right side
    78,965.40x = 4,702,745,374.87
  5. Step 5: Solve for x
    x = 4,702,745,374.87/78,965.40
  6. Step 6: Final answer
    x = 59,554.51

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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.