Home / 93,721.68-129,481.20-78,587.64

Finding the Fourth Proportional to 93,721.68, 129,481.20 and 78,587.64

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Solution

The fourth proportional to 93,721.68, 129,481.20 and 78,587.64 is: 108,572.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    93,721.68 : 129,481.20 = 78,587.64 : x
  2. Step 2: Convert to fraction form
    93,721.68/129,481.20 = 78,587.64/x
  3. Step 3: Cross multiply
    93,721.68x = 129,481.20 × 78,587.64
  4. Step 4: Simplify right side
    93,721.68x = 10,175,621,932.37
  5. Step 5: Solve for x
    x = 10,175,621,932.37/93,721.68
  6. Step 6: Final answer
    x = 108,572.76

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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.