Home / 100,964.17-139,331.51-55,643.79

Finding the Fourth Proportional to 100,964.17, 139,331.51 and 55,643.79

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Solution

The fourth proportional to 100,964.17, 139,331.51 and 55,643.79 is: 76,788.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,964.17 : 139,331.51 = 55,643.79 : x
  2. Step 2: Convert to fraction form
    100,964.17/139,331.51 = 55,643.79/x
  3. Step 3: Cross multiply
    100,964.17x = 139,331.51 × 55,643.79
  4. Step 4: Simplify right side
    100,964.17x = 7,752,933,282.82
  5. Step 5: Solve for x
    x = 7,752,933,282.82/100,964.17
  6. Step 6: Final answer
    x = 76,788.96

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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.