Home / 78,530.40-108,372.96-42,721.38

Finding the Fourth Proportional to 78,530.40, 108,372.96 and 42,721.38

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Solution

The fourth proportional to 78,530.40, 108,372.96 and 42,721.38 is: 58,956.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,530.40 : 108,372.96 = 42,721.38 : x
  2. Step 2: Convert to fraction form
    78,530.40/108,372.96 = 42,721.38/x
  3. Step 3: Cross multiply
    78,530.40x = 108,372.96 × 42,721.38
  4. Step 4: Simplify right side
    78,530.40x = 4,629,842,405.88
  5. Step 5: Solve for x
    x = 4,629,842,405.88/78,530.40
  6. Step 6: Final answer
    x = 58,956.05

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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.