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Finding the Fourth Proportional to 79,479.36, 109,687.68 and 47,649.60

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Solution

The fourth proportional to 79,479.36, 109,687.68 and 47,649.60 is: 65,760.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,479.36 : 109,687.68 = 47,649.60 : x
  2. Step 2: Convert to fraction form
    79,479.36/109,687.68 = 47,649.60/x
  3. Step 3: Cross multiply
    79,479.36x = 109,687.68 × 47,649.60
  4. Step 4: Simplify right side
    79,479.36x = 5,226,574,076.93
  5. Step 5: Solve for x
    x = 5,226,574,076.93/79,479.36
  6. Step 6: Final answer
    x = 65,760.14

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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.