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Finding the Fourth Proportional to 79,707.20, 109,986.36 and 45,713.93

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Solution

The fourth proportional to 79,707.20, 109,986.36 and 45,713.93 is: 63,079.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,707.20 : 109,986.36 = 45,713.93 : x
  2. Step 2: Convert to fraction form
    79,707.20/109,986.36 = 45,713.93/x
  3. Step 3: Cross multiply
    79,707.20x = 109,986.36 × 45,713.93
  4. Step 4: Simplify right side
    79,707.20x = 5,027,908,212.06
  5. Step 5: Solve for x
    x = 5,027,908,212.06/79,707.20
  6. Step 6: Final answer
    x = 63,079.73

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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.