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Finding the Fourth Proportional to 64,992.48, 89,691.12 and 36,698.40

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Solution

The fourth proportional to 64,992.48, 89,691.12 and 36,698.40 is: 50,644.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,992.48 : 89,691.12 = 36,698.40 : x
  2. Step 2: Convert to fraction form
    64,992.48/89,691.12 = 36,698.40/x
  3. Step 3: Cross multiply
    64,992.48x = 89,691.12 × 36,698.40
  4. Step 4: Simplify right side
    64,992.48x = 3,291,520,598.21
  5. Step 5: Solve for x
    x = 3,291,520,598.21/64,992.48
  6. Step 6: Final answer
    x = 50,644.64

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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.