Home / 101,656.28-140,338.78-78,944.29

Finding the Fourth Proportional to 101,656.28, 140,338.78 and 78,944.29

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Solution

The fourth proportional to 101,656.28, 140,338.78 and 78,944.29 is: 108,984.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,656.28 : 140,338.78 = 78,944.29 : x
  2. Step 2: Convert to fraction form
    101,656.28/140,338.78 = 78,944.29/x
  3. Step 3: Cross multiply
    101,656.28x = 140,338.78 × 78,944.29
  4. Step 4: Simplify right side
    101,656.28x = 11,078,944,798.36
  5. Step 5: Solve for x
    x = 11,078,944,798.36/101,656.28
  6. Step 6: Final answer
    x = 108,984.36

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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.