Home / 100,472.13-138,653.28-55,154.34

Finding the Fourth Proportional to 100,472.13, 138,653.28 and 55,154.34

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Solution

The fourth proportional to 100,472.13, 138,653.28 and 55,154.34 is: 76,113.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,472.13 : 138,653.28 = 55,154.34 : x
  2. Step 2: Convert to fraction form
    100,472.13/138,653.28 = 55,154.34/x
  3. Step 3: Cross multiply
    100,472.13x = 138,653.28 × 55,154.34
  4. Step 4: Simplify right side
    100,472.13x = 7,647,330,147.24
  5. Step 5: Solve for x
    x = 7,647,330,147.24/100,472.13
  6. Step 6: Final answer
    x = 76,113.94

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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.