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Finding the Fourth Proportional to 76,883.64, 115,344.89 and 21,479.64

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Solution

The fourth proportional to 76,883.64, 115,344.89 and 21,479.64 is: 32,224.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,883.64 : 115,344.89 = 21,479.64 : x
  2. Step 2: Convert to fraction form
    76,883.64/115,344.89 = 21,479.64/x
  3. Step 3: Cross multiply
    76,883.64x = 115,344.89 × 21,479.64
  4. Step 4: Simplify right side
    76,883.64x = 2,477,566,605.64
  5. Step 5: Solve for x
    x = 2,477,566,605.64/76,883.64
  6. Step 6: Final answer
    x = 32,224.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.