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Finding the Fourth Proportional to 100,290.93, 138,383.33 and 64,472.73

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Solution

The fourth proportional to 100,290.93, 138,383.33 and 64,472.73 is: 88,960.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,290.93 : 138,383.33 = 64,472.73 : x
  2. Step 2: Convert to fraction form
    100,290.93/138,383.33 = 64,472.73/x
  3. Step 3: Cross multiply
    100,290.93x = 138,383.33 × 64,472.73
  4. Step 4: Simplify right side
    100,290.93x = 8,921,951,071.59
  5. Step 5: Solve for x
    x = 8,921,951,071.59/100,290.93
  6. Step 6: Final answer
    x = 88,960.70

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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.