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Finding the Fourth Proportional to 100,330.68, 138,456.74 and 55,009.37

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Solution

The fourth proportional to 100,330.68, 138,456.74 and 55,009.37 is: 75,913.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,330.68 : 138,456.74 = 55,009.37 : x
  2. Step 2: Convert to fraction form
    100,330.68/138,456.74 = 55,009.37/x
  3. Step 3: Cross multiply
    100,330.68x = 138,456.74 × 55,009.37
  4. Step 4: Simplify right side
    100,330.68x = 7,616,417,072.32
  5. Step 5: Solve for x
    x = 7,616,417,072.32/100,330.68
  6. Step 6: Final answer
    x = 75,913.14

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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.