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Finding the Fourth Proportional to 100,330.29, 138,455.19 and 55,010.19

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Solution

The fourth proportional to 100,330.29, 138,455.19 and 55,010.19 is: 75,913.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,330.29 : 138,455.19 = 55,010.19 : x
  2. Step 2: Convert to fraction form
    100,330.29/138,455.19 = 55,010.19/x
  3. Step 3: Cross multiply
    100,330.29x = 138,455.19 × 55,010.19
  4. Step 4: Simplify right side
    100,330.29x = 7,616,446,308.39
  5. Step 5: Solve for x
    x = 7,616,446,308.39/100,330.29
  6. Step 6: Final answer
    x = 75,913.73

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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.