Home / 100,964.08-139,331.38-55,643.72

Finding the Fourth Proportional to 100,964.08, 139,331.38 and 55,643.72

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Solution

The fourth proportional to 100,964.08, 139,331.38 and 55,643.72 is: 76,788.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,964.08 : 139,331.38 = 55,643.72 : x
  2. Step 2: Convert to fraction form
    100,964.08/139,331.38 = 55,643.72/x
  3. Step 3: Cross multiply
    100,964.08x = 139,331.38 × 55,643.72
  4. Step 4: Simplify right side
    100,964.08x = 7,752,916,295.93
  5. Step 5: Solve for x
    x = 7,752,916,295.93/100,964.08
  6. Step 6: Final answer
    x = 76,788.86

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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.