Home / 100,005.13-138,007.07-54,683.14

Finding the Fourth Proportional to 100,005.13, 138,007.07 and 54,683.14

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Solution

The fourth proportional to 100,005.13, 138,007.07 and 54,683.14 is: 75,462.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,005.13 : 138,007.07 = 54,683.14 : x
  2. Step 2: Convert to fraction form
    100,005.13/138,007.07 = 54,683.14/x
  3. Step 3: Cross multiply
    100,005.13x = 138,007.07 × 54,683.14
  4. Step 4: Simplify right side
    100,005.13x = 7,546,659,828.89
  5. Step 5: Solve for x
    x = 7,546,659,828.89/100,005.13
  6. Step 6: Final answer
    x = 75,462.73

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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.