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Finding the Fourth Proportional to 100,154.80, 138,213.66 and 54,835.66

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Solution

The fourth proportional to 100,154.80, 138,213.66 and 54,835.66 is: 75,673.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,154.80 : 138,213.66 = 54,835.66 : x
  2. Step 2: Convert to fraction form
    100,154.80/138,213.66 = 54,835.66/x
  3. Step 3: Cross multiply
    100,154.80x = 138,213.66 × 54,835.66
  4. Step 4: Simplify right side
    100,154.80x = 7,579,037,267.12
  5. Step 5: Solve for x
    x = 7,579,037,267.12/100,154.80
  6. Step 6: Final answer
    x = 75,673.23

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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.