Home / 100,688.62-138,953.86-55,370.04

Finding the Fourth Proportional to 100,688.62, 138,953.86 and 55,370.04

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Solution

The fourth proportional to 100,688.62, 138,953.86 and 55,370.04 is: 76,412.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,688.62 : 138,953.86 = 55,370.04 : x
  2. Step 2: Convert to fraction form
    100,688.62/138,953.86 = 55,370.04/x
  3. Step 3: Cross multiply
    100,688.62x = 138,953.86 × 55,370.04
  4. Step 4: Simplify right side
    100,688.62x = 7,693,880,786.35
  5. Step 5: Solve for x
    x = 7,693,880,786.35/100,688.62
  6. Step 6: Final answer
    x = 76,412.62

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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.