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Finding the Fourth Proportional to 100,249.40, 138,277.50 and 64,484.66

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Solution

The fourth proportional to 100,249.40, 138,277.50 and 64,484.66 is: 88,945.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,249.40 : 138,277.50 = 64,484.66 : x
  2. Step 2: Convert to fraction form
    100,249.40/138,277.50 = 64,484.66/x
  3. Step 3: Cross multiply
    100,249.40x = 138,277.50 × 64,484.66
  4. Step 4: Simplify right side
    100,249.40x = 8,916,777,573.15
  5. Step 5: Solve for x
    x = 8,916,777,573.15/100,249.40
  6. Step 6: Final answer
    x = 88,945.94

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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.