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Finding the Fourth Proportional to 76,566.32, 114,840.35 and 20,410.64

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Solution

The fourth proportional to 76,566.32, 114,840.35 and 20,410.64 is: 30,613.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,566.32 : 114,840.35 = 20,410.64 : x
  2. Step 2: Convert to fraction form
    76,566.32/114,840.35 = 20,410.64/x
  3. Step 3: Cross multiply
    76,566.32x = 114,840.35 × 20,410.64
  4. Step 4: Simplify right side
    76,566.32x = 2,343,964,365.07
  5. Step 5: Solve for x
    x = 2,343,964,365.07/76,566.32
  6. Step 6: Final answer
    x = 30,613.52

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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.