Home / 100,423.29-138,579.51-55,100.15

Finding the Fourth Proportional to 100,423.29, 138,579.51 and 55,100.15

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Solution

The fourth proportional to 100,423.29, 138,579.51 and 55,100.15 is: 76,035.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,423.29 : 138,579.51 = 55,100.15 : x
  2. Step 2: Convert to fraction form
    100,423.29/138,579.51 = 55,100.15/x
  3. Step 3: Cross multiply
    100,423.29x = 138,579.51 × 55,100.15
  4. Step 4: Simplify right side
    100,423.29x = 7,635,751,511.39
  5. Step 5: Solve for x
    x = 7,635,751,511.39/100,423.29
  6. Step 6: Final answer
    x = 76,035.66

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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.