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Finding the Fourth Proportional to 100,672.77, 138,925.49 and 55,350.71

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Solution

The fourth proportional to 100,672.77, 138,925.49 and 55,350.71 is: 76,382.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,672.77 : 138,925.49 = 55,350.71 : x
  2. Step 2: Convert to fraction form
    100,672.77/138,925.49 = 55,350.71/x
  3. Step 3: Cross multiply
    100,672.77x = 138,925.49 × 55,350.71
  4. Step 4: Simplify right side
    100,672.77x = 7,689,623,537.22
  5. Step 5: Solve for x
    x = 7,689,623,537.22/100,672.77
  6. Step 6: Final answer
    x = 76,382.36

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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.