Home / 100,210.35-138,255.94-57,158.91

Finding the Fourth Proportional to 100,210.35, 138,255.94 and 57,158.91

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Solution

The fourth proportional to 100,210.35, 138,255.94 and 57,158.91 is: 78,859.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,210.35 : 138,255.94 = 57,158.91 : x
  2. Step 2: Convert to fraction form
    100,210.35/138,255.94 = 57,158.91/x
  3. Step 3: Cross multiply
    100,210.35x = 138,255.94 × 57,158.91
  4. Step 4: Simplify right side
    100,210.35x = 7,902,558,831.43
  5. Step 5: Solve for x
    x = 7,902,558,831.43/100,210.35
  6. Step 6: Final answer
    x = 78,859.71

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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.