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Finding the Fourth Proportional to 100,063.30, 138,086.21 and 54,740.76

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Solution

The fourth proportional to 100,063.30, 138,086.21 and 54,740.76 is: 75,541.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,063.30 : 138,086.21 = 54,740.76 : x
  2. Step 2: Convert to fraction form
    100,063.30/138,086.21 = 54,740.76/x
  3. Step 3: Cross multiply
    100,063.30x = 138,086.21 × 54,740.76
  4. Step 4: Simplify right side
    100,063.30x = 7,558,944,080.92
  5. Step 5: Solve for x
    x = 7,558,944,080.92/100,063.30
  6. Step 6: Final answer
    x = 75,541.62

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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.