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Finding the Fourth Proportional to 79,496.40, 109,715.40 and 51,284.12

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Solution

The fourth proportional to 79,496.40, 109,715.40 and 51,284.12 is: 70,778.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,496.40 : 109,715.40 = 51,284.12 : x
  2. Step 2: Convert to fraction form
    79,496.40/109,715.40 = 51,284.12/x
  3. Step 3: Cross multiply
    79,496.40x = 109,715.40 × 51,284.12
  4. Step 4: Simplify right side
    79,496.40x = 5,626,657,739.45
  5. Step 5: Solve for x
    x = 5,626,657,739.45/79,496.40
  6. Step 6: Final answer
    x = 70,778.77

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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.