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Finding the Fourth Proportional to 100,221.68, 138,210.48 and 59,928.88

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Solution

The fourth proportional to 100,221.68, 138,210.48 and 59,928.88 is: 82,644.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,221.68 : 138,210.48 = 59,928.88 : x
  2. Step 2: Convert to fraction form
    100,221.68/138,210.48 = 59,928.88/x
  3. Step 3: Cross multiply
    100,221.68x = 138,210.48 × 59,928.88
  4. Step 4: Simplify right side
    100,221.68x = 8,282,799,270.66
  5. Step 5: Solve for x
    x = 8,282,799,270.66/100,221.68
  6. Step 6: Final answer
    x = 82,644.79

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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.