Home / 100,705.11-138,970.26-55,383.08

Finding the Fourth Proportional to 100,705.11, 138,970.26 and 55,383.08

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Solution

The fourth proportional to 100,705.11, 138,970.26 and 55,383.08 is: 76,427.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,705.11 : 138,970.26 = 55,383.08 : x
  2. Step 2: Convert to fraction form
    100,705.11/138,970.26 = 55,383.08/x
  3. Step 3: Cross multiply
    100,705.11x = 138,970.26 × 55,383.08
  4. Step 4: Simplify right side
    100,705.11x = 7,696,600,332.35
  5. Step 5: Solve for x
    x = 7,696,600,332.35/100,705.11
  6. Step 6: Final answer
    x = 76,427.11

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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.