Home / 138,023.92-190,479.77-77,613.58

Finding the Fourth Proportional to 138,023.92, 190,479.77 and 77,613.58

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Solution

The fourth proportional to 138,023.92, 190,479.77 and 77,613.58 is: 107,110.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,023.92 : 190,479.77 = 77,613.58 : x
  2. Step 2: Convert to fraction form
    138,023.92/190,479.77 = 77,613.58/x
  3. Step 3: Cross multiply
    138,023.92x = 190,479.77 × 77,613.58
  4. Step 4: Simplify right side
    138,023.92x = 14,783,816,867.28
  5. Step 5: Solve for x
    x = 14,783,816,867.28/138,023.92
  6. Step 6: Final answer
    x = 107,110.54

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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.