Home / 100,724.15-138,996.38-55,402.08

Finding the Fourth Proportional to 100,724.15, 138,996.38 and 55,402.08

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Solution

The fourth proportional to 100,724.15, 138,996.38 and 55,402.08 is: 76,453.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,724.15 : 138,996.38 = 55,402.08 : x
  2. Step 2: Convert to fraction form
    100,724.15/138,996.38 = 55,402.08/x
  3. Step 3: Cross multiply
    100,724.15x = 138,996.38 × 55,402.08
  4. Step 4: Simplify right side
    100,724.15x = 7,700,688,287.46
  5. Step 5: Solve for x
    x = 7,700,688,287.46/100,724.15
  6. Step 6: Final answer
    x = 76,453.25

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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.