Home / 100,140.36-138,193.96-55,428.36

Finding the Fourth Proportional to 100,140.36, 138,193.96 and 55,428.36

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Solution

The fourth proportional to 100,140.36, 138,193.96 and 55,428.36 is: 76,491.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,140.36 : 138,193.96 = 55,428.36 : x
  2. Step 2: Convert to fraction form
    100,140.36/138,193.96 = 55,428.36/x
  3. Step 3: Cross multiply
    100,140.36x = 138,193.96 × 55,428.36
  4. Step 4: Simplify right side
    100,140.36x = 7,659,864,564.71
  5. Step 5: Solve for x
    x = 7,659,864,564.71/100,140.36
  6. Step 6: Final answer
    x = 76,491.28

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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.