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Finding the Fourth Proportional to 79,632.56, 109,655.92 and 77,864.60

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Solution

The fourth proportional to 79,632.56, 109,655.92 and 77,864.60 is: 107,221.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,632.56 : 109,655.92 = 77,864.60 : x
  2. Step 2: Convert to fraction form
    79,632.56/109,655.92 = 77,864.60/x
  3. Step 3: Cross multiply
    79,632.56x = 109,655.92 × 77,864.60
  4. Step 4: Simplify right side
    79,632.56x = 8,538,314,348.43
  5. Step 5: Solve for x
    x = 8,538,314,348.43/79,632.56
  6. Step 6: Final answer
    x = 107,221.40

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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.