Home / 100,012.68-138,032.10-66,015.36

Finding the Fourth Proportional to 100,012.68, 138,032.10 and 66,015.36

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Solution

The fourth proportional to 100,012.68, 138,032.10 and 66,015.36 is: 91,110.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,012.68 : 138,032.10 = 66,015.36 : x
  2. Step 2: Convert to fraction form
    100,012.68/138,032.10 = 66,015.36/x
  3. Step 3: Cross multiply
    100,012.68x = 138,032.10 × 66,015.36
  4. Step 4: Simplify right side
    100,012.68x = 9,112,238,773.06
  5. Step 5: Solve for x
    x = 9,112,238,773.06/100,012.68
  6. Step 6: Final answer
    x = 91,110.83

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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.