Home / 100,154.07-138,214.26-54,831.30

Finding the Fourth Proportional to 100,154.07, 138,214.26 and 54,831.30

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Solution

The fourth proportional to 100,154.07, 138,214.26 and 54,831.30 is: 75,668.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,154.07 : 138,214.26 = 54,831.30 : x
  2. Step 2: Convert to fraction form
    100,154.07/138,214.26 = 54,831.30/x
  3. Step 3: Cross multiply
    100,154.07x = 138,214.26 × 54,831.30
  4. Step 4: Simplify right side
    100,154.07x = 7,578,467,554.34
  5. Step 5: Solve for x
    x = 7,578,467,554.34/100,154.07
  6. Step 6: Final answer
    x = 75,668.09

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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.