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Finding the Fourth Proportional to 79,782.64, 110,069.18 and 45,778.84

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Solution

The fourth proportional to 79,782.64, 110,069.18 and 45,778.84 is: 63,157.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,782.64 : 110,069.18 = 45,778.84 : x
  2. Step 2: Convert to fraction form
    79,782.64/110,069.18 = 45,778.84/x
  3. Step 3: Cross multiply
    79,782.64x = 110,069.18 × 45,778.84
  4. Step 4: Simplify right side
    79,782.64x = 5,038,839,047.75
  5. Step 5: Solve for x
    x = 5,038,839,047.75/79,782.64
  6. Step 6: Final answer
    x = 63,157.09

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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.